81121060

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1\times {\mathrm{409}}^1$

素因数の和:676

約数の個数: 48

約数和(自身を含む): 175230720

約数和(自身を除く): 94109660

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 211, 235, 409, 422, 470, 818, 844, 940, 1055, 1636, 2045, 2110, 4090, 4220, 8180, 9917, 19223, 19834, 38446, 39668, 49585, 76892, 86299, 96115, 99170, 172598, 192230, 198340, 345196, 384460, 431495, 862990, 1725980, 4056053, 8112106, 16224212, 20280265, 40560530, 81121060]

約数ペア:

[(1, 81121060), (2, 40560530), (4, 20280265), (5, 16224212), (10, 8112106), (20, 4056053), (47, 1725980), (94, 862990), (188, 431495), (211, 384460), (235, 345196), (409, 198340), (422, 192230), (470, 172598), (818, 99170), (844, 96115), (940, 86299), (1055, 76892), (1636, 49585), (2045, 39668), (2110, 38446), (4090, 19834), (4220, 19223), (8180, 9917)]