20128816

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1721}}^1$

素因数の和:1789

約数の個数: 40

約数和(自身を含む): 42278544

約数和(自身を除く): 22149728

約数列:

[1, 2, 4, 8, 16, 17, 34, 43, 68, 86, 136, 172, 272, 344, 688, 731, 1462, 1721, 2924, 3442, 5848, 6884, 11696, 13768, 27536, 29257, 58514, 74003, 117028, 148006, 234056, 296012, 468112, 592024, 1184048, 1258051, 2516102, 5032204, 10064408, 20128816]

約数ペア:

[(1, 20128816), (2, 10064408), (4, 5032204), (8, 2516102), (16, 1258051), (17, 1184048), (34, 592024), (43, 468112), (68, 296012), (86, 234056), (136, 148006), (172, 117028), (272, 74003), (344, 58514), (688, 29257), (731, 27536), (1462, 13768), (1721, 11696), (2924, 6884), (3442, 5848)]