20521800

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{877}}^1$

素因数の和:912

約数の個数: 144

約数和(自身を含む): 74305140

約数和(自身を除く): 53783340

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 25, 26, 30, 36, 39, 40, 45, 50, 52, 60, 65, 72, 75, 78, 90, 100, 104, 117, 120, 130, 150, 156, 180, 195, 200, 225, 234, 260, 300, 312, 325, 360, 390, 450, 468, 520, 585, 600, 650, 780, 877, 900, 936, 975, 1170, 1300, 1560, 1754, 1800, 1950, 2340, 2600, 2631, 2925, 3508, 3900, 4385, 4680, 5262, 5850, 7016, 7800, 7893, 8770, 10524, 11401, 11700, 13155, 15786, 17540, 21048, 21925, 22802, 23400, 26310, 31572, 34203, 35080, 39465, 43850, 45604, 52620, 57005, 63144, 65775, 68406, 78930, 87700, 91208, 102609, 105240, 114010, 131550, 136812, 157860, 171015, 175400, 197325, 205218, 228020, 263100, 273624, 285025, 315720, 342030, 394650, 410436, 456040, 513045, 526200, 570050, 684060, 789300, 820872, 855075, 1026090, 1140100, 1368120, 1578600, 1710150, 2052180, 2280200, 2565225, 3420300, 4104360, 5130450, 6840600, 10260900, 20521800]

約数ペア:

[(1, 20521800), (2, 10260900), (3, 6840600), (4, 5130450), (5, 4104360), (6, 3420300), (8, 2565225), (9, 2280200), (10, 2052180), (12, 1710150), (13, 1578600), (15, 1368120), (18, 1140100), (20, 1026090), (24, 855075), (25, 820872), (26, 789300), (30, 684060), (36, 570050), (39, 526200), (40, 513045), (45, 456040), (50, 410436), (52, 394650), (60, 342030), (65, 315720), (72, 285025), (75, 273624), (78, 263100), (90, 228020), (100, 205218), (104, 197325), (117, 175400), (120, 171015), (130, 157860), (150, 136812), (156, 131550), (180, 114010), (195, 105240), (200, 102609), (225, 91208), (234, 87700), (260, 78930), (300, 68406), (312, 65775), (325, 63144), (360, 57005), (390, 52620), (450, 45604), (468, 43850), (520, 39465), (585, 35080), (600, 34203), (650, 31572), (780, 26310), (877, 23400), (900, 22802), (936, 21925), (975, 21048), (1170, 17540), (1300, 15786), (1560, 13155), (1754, 11700), (1800, 11401), (1950, 10524), (2340, 8770), (2600, 7893), (2631, 7800), (2925, 7016), (3508, 5850), (3900, 5262), (4385, 4680)]