640211279

素因数分解:

${\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{431}}^1$

素因数の和:631

約数の個数: 32

約数和(自身を含む): 739031040

約数和(自身を除く): 98819761

約数列:

[1, 17, 23, 29, 131, 391, 431, 493, 667, 2227, 3013, 3799, 7327, 9913, 11339, 12499, 51221, 56461, 64583, 87377, 168521, 212483, 287477, 959837, 1298603, 1485409, 1637369, 4887109, 22076251, 27835273, 37659487, 640211279]

約数ペア:

[(1, 640211279), (17, 37659487), (23, 27835273), (29, 22076251), (131, 4887109), (391, 1637369), (431, 1485409), (493, 1298603), (667, 959837), (2227, 287477), (3013, 212483), (3799, 168521), (7327, 87377), (9913, 64583), (11339, 56461), (12499, 51221)]