281621560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{640049}}^1$

素因数の和:640071

約数の個数: 32

約数和(自身を含む): 691254000

約数和(自身を除く): 409632440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 640049, 1280098, 2560196, 3200245, 5120392, 6400490, 7040539, 12800980, 14081078, 25601960, 28162156, 35202695, 56324312, 70405390, 140810780, 281621560]

約数ペア:

[(1, 281621560), (2, 140810780), (4, 70405390), (5, 56324312), (8, 35202695), (10, 28162156), (11, 25601960), (20, 14081078), (22, 12800980), (40, 7040539), (44, 6400490), (55, 5120392), (88, 3200245), (110, 2560196), (220, 1280098), (440, 640049)]