256975940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{12511}}^1$

素因数の和:12612

約数の個数: 48

約数和(自身を含む): 588564480

約数和(自身を除く): 331588540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1580, 2054, 4108, 5135, 10270, 12511, 20540, 25022, 50044, 62555, 125110, 162643, 250220, 325286, 650572, 813215, 988369, 1626430, 1976738, 3252860, 3953476, 4941845, 9883690, 12848797, 19767380, 25697594, 51395188, 64243985, 128487970, 256975940]

約数ペア:

[(1, 256975940), (2, 128487970), (4, 64243985), (5, 51395188), (10, 25697594), (13, 19767380), (20, 12848797), (26, 9883690), (52, 4941845), (65, 3953476), (79, 3252860), (130, 1976738), (158, 1626430), (260, 988369), (316, 813215), (395, 650572), (790, 325286), (1027, 250220), (1580, 162643), (2054, 125110), (4108, 62555), (5135, 50044), (10270, 25022), (12511, 20540)]