20556900

素因数分解:

$2^2\times 3^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1$

素因数の和:291

約数の個数: 216

約数和(自身を含む): 79619904

約数和(自身を除く): 59063004

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 25, 26, 28, 30, 35, 36, 39, 42, 45, 50, 52, 60, 63, 65, 70, 75, 78, 84, 90, 91, 100, 105, 117, 126, 130, 140, 150, 156, 175, 180, 182, 195, 210, 225, 234, 251, 252, 260, 273, 300, 315, 325, 350, 364, 390, 420, 450, 455, 468, 502, 525, 546, 585, 630, 650, 700, 753, 780, 819, 900, 910, 975, 1004, 1050, 1092, 1170, 1255, 1260, 1300, 1365, 1506, 1575, 1638, 1757, 1820, 1950, 2100, 2259, 2275, 2340, 2510, 2730, 2925, 3012, 3150, 3263, 3276, 3514, 3765, 3900, 4095, 4518, 4550, 5020, 5271, 5460, 5850, 6275, 6300, 6526, 6825, 7028, 7530, 8190, 8785, 9036, 9100, 9789, 10542, 11295, 11700, 12550, 13052, 13650, 15060, 15813, 16315, 16380, 17570, 18825, 19578, 20475, 21084, 22590, 22841, 25100, 26355, 27300, 29367, 31626, 32630, 35140, 37650, 39156, 40950, 43925, 45180, 45682, 48945, 52710, 56475, 58734, 63252, 65260, 68523, 75300, 79065, 81575, 81900, 87850, 91364, 97890, 105420, 112950, 114205, 117468, 131775, 137046, 146835, 158130, 163150, 175700, 195780, 205569, 225900, 228410, 244725, 263550, 274092, 293670, 316260, 326300, 342615, 395325, 411138, 456820, 489450, 527100, 571025, 587340, 685230, 734175, 790650, 822276, 978900, 1027845, 1142050, 1370460, 1468350, 1581300, 1713075, 2055690, 2284100, 2936700, 3426150, 4111380, 5139225, 6852300, 10278450, 20556900]

約数ペア:

[(1, 20556900), (2, 10278450), (3, 6852300), (4, 5139225), (5, 4111380), (6, 3426150), (7, 2936700), (9, 2284100), (10, 2055690), (12, 1713075), (13, 1581300), (14, 1468350), (15, 1370460), (18, 1142050), (20, 1027845), (21, 978900), (25, 822276), (26, 790650), (28, 734175), (30, 685230), (35, 587340), (36, 571025), (39, 527100), (42, 489450), (45, 456820), (50, 411138), (52, 395325), (60, 342615), (63, 326300), (65, 316260), (70, 293670), (75, 274092), (78, 263550), (84, 244725), (90, 228410), (91, 225900), (100, 205569), (105, 195780), (117, 175700), (126, 163150), (130, 158130), (140, 146835), (150, 137046), (156, 131775), (175, 117468), (180, 114205), (182, 112950), (195, 105420), (210, 97890), (225, 91364), (234, 87850), (251, 81900), (252, 81575), (260, 79065), (273, 75300), (300, 68523), (315, 65260), (325, 63252), (350, 58734), (364, 56475), (390, 52710), (420, 48945), (450, 45682), (455, 45180), (468, 43925), (502, 40950), (525, 39156), (546, 37650), (585, 35140), (630, 32630), (650, 31626), (700, 29367), (753, 27300), (780, 26355), (819, 25100), (900, 22841), (910, 22590), (975, 21084), (1004, 20475), (1050, 19578), (1092, 18825), (1170, 17570), (1255, 16380), (1260, 16315), (1300, 15813), (1365, 15060), (1506, 13650), (1575, 13052), (1638, 12550), (1757, 11700), (1820, 11295), (1950, 10542), (2100, 9789), (2259, 9100), (2275, 9036), (2340, 8785), (2510, 8190), (2730, 7530), (2925, 7028), (3012, 6825), (3150, 6526), (3263, 6300), (3276, 6275), (3514, 5850), (3765, 5460), (3900, 5271), (4095, 5020), (4518, 4550)]