20865280

素因数分解:

$2^8\times 5^1\times {\mathrm{16301}}^1$

素因数の和:16322

約数の個数: 36

約数和(自身を含む): 49981932

約数和(自身を除く): 29116652

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16301, 32602, 65204, 81505, 130408, 163010, 260816, 326020, 521632, 652040, 1043264, 1304080, 2086528, 2608160, 4173056, 5216320, 10432640, 20865280]

約数ペア:

[(1, 20865280), (2, 10432640), (4, 5216320), (5, 4173056), (8, 2608160), (10, 2086528), (16, 1304080), (20, 1043264), (32, 652040), (40, 521632), (64, 326020), (80, 260816), (128, 163010), (160, 130408), (256, 81505), (320, 65204), (640, 32602), (1280, 16301)]