20542990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{8317}}^1$

素因数の和:8356

約数の個数: 32

約数和(自身を含む): 41922720

約数和(自身を除く): 21379730

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 494, 1235, 2470, 8317, 16634, 41585, 83170, 108121, 158023, 216242, 316046, 540605, 790115, 1081210, 1580230, 2054299, 4108598, 10271495, 20542990]

約数ペア:

[(1, 20542990), (2, 10271495), (5, 4108598), (10, 2054299), (13, 1580230), (19, 1081210), (26, 790115), (38, 540605), (65, 316046), (95, 216242), (130, 158023), (190, 108121), (247, 83170), (494, 41585), (1235, 16634), (2470, 8317)]