206517380

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1\times {\mathrm{641}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 441670320

約数和(自身を除く): 235152940

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 181, 356, 362, 445, 641, 724, 890, 905, 1282, 1780, 1810, 2564, 3205, 3620, 6410, 12820, 16109, 32218, 57049, 64436, 80545, 114098, 116021, 161090, 228196, 232042, 285245, 322180, 464084, 570490, 580105, 1140980, 1160210, 2320420, 10325869, 20651738, 41303476, 51629345, 103258690, 206517380]

約数ペア:

[(1, 206517380), (2, 103258690), (4, 51629345), (5, 41303476), (10, 20651738), (20, 10325869), (89, 2320420), (178, 1160210), (181, 1140980), (356, 580105), (362, 570490), (445, 464084), (641, 322180), (724, 285245), (890, 232042), (905, 228196), (1282, 161090), (1780, 116021), (1810, 114098), (2564, 80545), (3205, 64436), (3620, 57049), (6410, 32218), (12820, 16109)]