640891784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{48523}}^1$

素因数の和:48669

約数の個数: 32

約数和(自身を含む): 1304325120

約数和(自身を除く): 663433336

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 127, 254, 508, 1016, 1651, 3302, 6604, 13208, 48523, 97046, 194092, 388184, 630799, 1261598, 2523196, 5046392, 6162421, 12324842, 24649684, 49299368, 80111473, 160222946, 320445892, 640891784]

約数ペア:

[(1, 640891784), (2, 320445892), (4, 160222946), (8, 80111473), (13, 49299368), (26, 24649684), (52, 12324842), (104, 6162421), (127, 5046392), (254, 2523196), (508, 1261598), (1016, 630799), (1651, 388184), (3302, 194092), (6604, 97046), (13208, 48523)]