20915508

素因数分解:

$2^2\times 3^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{163}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 53570272

約数和(自身を除く): 32654764

約数列:

[1, 2, 3, 4, 6, 12, 17, 34, 37, 51, 68, 74, 102, 111, 148, 163, 204, 222, 289, 326, 444, 489, 578, 629, 652, 867, 978, 1156, 1258, 1734, 1887, 1956, 2516, 2771, 3468, 3774, 5542, 6031, 7548, 8313, 10693, 11084, 12062, 16626, 18093, 21386, 24124, 32079, 33252, 36186, 42772, 47107, 64158, 72372, 94214, 102527, 128316, 141321, 188428, 205054, 282642, 307581, 410108, 565284, 615162, 1230324, 1742959, 3485918, 5228877, 6971836, 10457754, 20915508]

約数ペア:

[(1, 20915508), (2, 10457754), (3, 6971836), (4, 5228877), (6, 3485918), (12, 1742959), (17, 1230324), (34, 615162), (37, 565284), (51, 410108), (68, 307581), (74, 282642), (102, 205054), (111, 188428), (148, 141321), (163, 128316), (204, 102527), (222, 94214), (289, 72372), (326, 64158), (444, 47107), (489, 42772), (578, 36186), (629, 33252), (652, 32079), (867, 24124), (978, 21386), (1156, 18093), (1258, 16626), (1734, 12062), (1887, 11084), (1956, 10693), (2516, 8313), (2771, 7548), (3468, 6031), (3774, 5542)]