28938217

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^2\times {\mathrm{101}}^1$

素因数の和:241

約数の個数: 24

約数和(自身を含む): 37043136

約数和(自身を除く): 8104919

約数列:

[1, 7, 11, 61, 77, 101, 427, 671, 707, 1111, 3721, 4697, 6161, 7777, 26047, 40931, 43127, 67771, 286517, 375821, 474397, 2630747, 4134031, 28938217]

約数ペア:

[(1, 28938217), (7, 4134031), (11, 2630747), (61, 474397), (77, 375821), (101, 286517), (427, 67771), (671, 43127), (707, 40931), (1111, 26047), (3721, 7777), (4697, 6161)]