21556912

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1699}}^1$

素因数の和:1781

約数の個数: 40

約数和(自身を含む): 45743600

約数和(自身を除く): 24186688

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 61, 104, 122, 208, 244, 488, 793, 976, 1586, 1699, 3172, 3398, 6344, 6796, 12688, 13592, 22087, 27184, 44174, 88348, 103639, 176696, 207278, 353392, 414556, 829112, 1347307, 1658224, 2694614, 5389228, 10778456, 21556912]

約数ペア:

[(1, 21556912), (2, 10778456), (4, 5389228), (8, 2694614), (13, 1658224), (16, 1347307), (26, 829112), (52, 414556), (61, 353392), (104, 207278), (122, 176696), (208, 103639), (244, 88348), (488, 44174), (793, 27184), (976, 22087), (1586, 13592), (1699, 12688), (3172, 6796), (3398, 6344)]