491289940

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{2237}}^1$

素因数の和:2464

約数の個数: 48

約数和(自身を含む): 1052755200

約数和(自身を除く): 561465260

約数列:

[1, 2, 4, 5, 10, 20, 79, 139, 158, 278, 316, 395, 556, 695, 790, 1390, 1580, 2237, 2780, 4474, 8948, 10981, 11185, 21962, 22370, 43924, 44740, 54905, 109810, 176723, 219620, 310943, 353446, 621886, 706892, 883615, 1243772, 1554715, 1767230, 3109430, 3534460, 6218860, 24564497, 49128994, 98257988, 122822485, 245644970, 491289940]

約数ペア:

[(1, 491289940), (2, 245644970), (4, 122822485), (5, 98257988), (10, 49128994), (20, 24564497), (79, 6218860), (139, 3534460), (158, 3109430), (278, 1767230), (316, 1554715), (395, 1243772), (556, 883615), (695, 706892), (790, 621886), (1390, 353446), (1580, 310943), (2237, 219620), (2780, 176723), (4474, 109810), (8948, 54905), (10981, 44740), (11185, 43924), (21962, 22370)]