21090320

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{2333}}^1$

素因数の和:2459

約数の個数: 40

約数和(自身を含む): 49490136

約数和(自身を除く): 28399816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 2333, 4520, 4666, 9040, 9332, 11665, 18664, 23330, 37328, 46660, 93320, 186640, 263629, 527258, 1054516, 1318145, 2109032, 2636290, 4218064, 5272580, 10545160, 21090320]

約数ペア:

[(1, 21090320), (2, 10545160), (4, 5272580), (5, 4218064), (8, 2636290), (10, 2109032), (16, 1318145), (20, 1054516), (40, 527258), (80, 263629), (113, 186640), (226, 93320), (452, 46660), (565, 37328), (904, 23330), (1130, 18664), (1808, 11665), (2260, 9332), (2333, 9040), (4520, 4666)]