642860.0000000

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{647}}^1$

素因数の和:690

約数の個数: 32

約数和(自身を含む): 3919104

約数和(自身を除く): 1984574

約数列:

[1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 647, 1294, 1495, 2990, 3235, 6470, 8411, 14881, 16822, 29762, 42055, 74405, 84110, 148810, 193453, 386906, 967265, 1934530]

約数ペア:

[(1, 1934530), (2, 967265), (5, 386906), (10, 193453), (13, 148810), (23, 84110), (26, 74405), (46, 42055), (65, 29762), (115, 16822), (130, 14881), (230, 8411), (299, 6470), (598, 3235), (647, 2990), (1294, 1495)]