2813980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 6491520

約数和(自身を除く): 3677540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 137, 158, 260, 274, 316, 395, 548, 685, 790, 1027, 1370, 1580, 1781, 2054, 2740, 3562, 4108, 5135, 7124, 8905, 10270, 10823, 17810, 20540, 21646, 35620, 43292, 54115, 108230, 140699, 216460, 281398, 562796, 703495, 1406990, 2813980]

約数ペア:

[(1, 2813980), (2, 1406990), (4, 703495), (5, 562796), (10, 281398), (13, 216460), (20, 140699), (26, 108230), (52, 54115), (65, 43292), (79, 35620), (130, 21646), (137, 20540), (158, 17810), (260, 10823), (274, 10270), (316, 8905), (395, 7124), (548, 5135), (685, 4108), (790, 3562), (1027, 2740), (1370, 2054), (1580, 1781)]