20681880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{193}}^1$

素因数の和:273

約数の個数: 128

約数和(自身を含む): 67046400

約数和(自身を除く): 46364520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 47, 57, 60, 76, 94, 95, 114, 120, 141, 152, 188, 190, 193, 228, 235, 282, 285, 376, 380, 386, 456, 470, 564, 570, 579, 705, 760, 772, 893, 940, 965, 1128, 1140, 1158, 1410, 1544, 1786, 1880, 1930, 2280, 2316, 2679, 2820, 2895, 3572, 3667, 3860, 4465, 4632, 5358, 5640, 5790, 7144, 7334, 7720, 8930, 9071, 10716, 11001, 11580, 13395, 14668, 17860, 18142, 18335, 21432, 22002, 23160, 26790, 27213, 29336, 35720, 36284, 36670, 44004, 45355, 53580, 54426, 55005, 72568, 73340, 88008, 90710, 107160, 108852, 110010, 136065, 146680, 172349, 181420, 217704, 220020, 272130, 344698, 362840, 440040, 517047, 544260, 689396, 861745, 1034094, 1088520, 1378792, 1723490, 2068188, 2585235, 3446980, 4136376, 5170470, 6893960, 10340940, 20681880]

約数ペア:

[(1, 20681880), (2, 10340940), (3, 6893960), (4, 5170470), (5, 4136376), (6, 3446980), (8, 2585235), (10, 2068188), (12, 1723490), (15, 1378792), (19, 1088520), (20, 1034094), (24, 861745), (30, 689396), (38, 544260), (40, 517047), (47, 440040), (57, 362840), (60, 344698), (76, 272130), (94, 220020), (95, 217704), (114, 181420), (120, 172349), (141, 146680), (152, 136065), (188, 110010), (190, 108852), (193, 107160), (228, 90710), (235, 88008), (282, 73340), (285, 72568), (376, 55005), (380, 54426), (386, 53580), (456, 45355), (470, 44004), (564, 36670), (570, 36284), (579, 35720), (705, 29336), (760, 27213), (772, 26790), (893, 23160), (940, 22002), (965, 21432), (1128, 18335), (1140, 18142), (1158, 17860), (1410, 14668), (1544, 13395), (1786, 11580), (1880, 11001), (1930, 10716), (2280, 9071), (2316, 8930), (2679, 7720), (2820, 7334), (2895, 7144), (3572, 5790), (3667, 5640), (3860, 5358), (4465, 4632)]