21985730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1291}}^1$

素因数の和:1442

約数の個数: 32

約数和(自身を含む): 42977088

約数和(自身を除く): 20991358

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 131, 262, 655, 1291, 1310, 1703, 2582, 3406, 6455, 8515, 12910, 16783, 17030, 33566, 83915, 167830, 169121, 338242, 845605, 1691210, 2198573, 4397146, 10992865, 21985730]

約数ペア:

[(1, 21985730), (2, 10992865), (5, 4397146), (10, 2198573), (13, 1691210), (26, 845605), (65, 338242), (130, 169121), (131, 167830), (262, 83915), (655, 33566), (1291, 17030), (1310, 16783), (1703, 12910), (2582, 8515), (3406, 6455)]