639781639

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{577}}^1$

素因数の和:775

約数の個数: 32

約数和(自身を含む): 783046656

約数和(自身を除く): 143265017

約数列:

[1, 7, 23, 71, 97, 161, 497, 577, 679, 1633, 2231, 4039, 6887, 11431, 13271, 15617, 40967, 48209, 55969, 92897, 158401, 286769, 391783, 942241, 1108807, 1287287, 3973799, 6595687, 9011009, 27816593, 91397377, 639781639]

約数ペア:

[(1, 639781639), (7, 91397377), (23, 27816593), (71, 9011009), (97, 6595687), (161, 3973799), (497, 1287287), (577, 1108807), (679, 942241), (1633, 391783), (2231, 286769), (4039, 158401), (6887, 92897), (11431, 55969), (13271, 48209), (15617, 40967)]