21900320

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10529}}^1$

素因数の和:10557

約数の個数: 48

約数和(自身を含む): 55724760

約数和(自身を除く): 33824440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10529, 21058, 42116, 52645, 84232, 105290, 136877, 168464, 210580, 273754, 336928, 421160, 547508, 684385, 842320, 1095016, 1368770, 1684640, 2190032, 2737540, 4380064, 5475080, 10950160, 21900320]

約数ペア:

[(1, 21900320), (2, 10950160), (4, 5475080), (5, 4380064), (8, 2737540), (10, 2190032), (13, 1684640), (16, 1368770), (20, 1095016), (26, 842320), (32, 684385), (40, 547508), (52, 421160), (65, 336928), (80, 273754), (104, 210580), (130, 168464), (160, 136877), (208, 105290), (260, 84232), (416, 52645), (520, 42116), (1040, 21058), (2080, 10529)]