21405870

素因数分解:

$2^1\times 3^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{383}}^1$

素因数の和:428

約数の個数: 96

約数和(自身を含む): 60383232

約数和(自身を除く): 38977362

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 27, 30, 45, 46, 54, 69, 81, 90, 115, 135, 138, 162, 207, 230, 243, 270, 345, 383, 405, 414, 486, 621, 690, 766, 810, 1035, 1149, 1215, 1242, 1863, 1915, 2070, 2298, 2430, 3105, 3447, 3726, 3830, 5589, 5745, 6210, 6894, 8809, 9315, 10341, 11178, 11490, 17235, 17618, 18630, 20682, 26427, 27945, 31023, 34470, 44045, 51705, 52854, 55890, 62046, 79281, 88090, 93069, 103410, 132135, 155115, 158562, 186138, 237843, 264270, 310230, 396405, 465345, 475686, 713529, 792810, 930690, 1189215, 1427058, 2140587, 2378430, 3567645, 4281174, 7135290, 10702935, 21405870]

約数ペア:

[(1, 21405870), (2, 10702935), (3, 7135290), (5, 4281174), (6, 3567645), (9, 2378430), (10, 2140587), (15, 1427058), (18, 1189215), (23, 930690), (27, 792810), (30, 713529), (45, 475686), (46, 465345), (54, 396405), (69, 310230), (81, 264270), (90, 237843), (115, 186138), (135, 158562), (138, 155115), (162, 132135), (207, 103410), (230, 93069), (243, 88090), (270, 79281), (345, 62046), (383, 55890), (405, 52854), (414, 51705), (486, 44045), (621, 34470), (690, 31023), (766, 27945), (810, 26427), (1035, 20682), (1149, 18630), (1215, 17618), (1242, 17235), (1863, 11490), (1915, 11178), (2070, 10341), (2298, 9315), (2430, 8809), (3105, 6894), (3447, 6210), (3726, 5745), (3830, 5589)]