20368640

素因数分解:

$2^8\times 5^1\times {\mathrm{15913}}^1$

素因数の和:15934

約数の個数: 36

約数和(自身を含む): 48792324

約数和(自身を除く): 28423684

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15913, 31826, 63652, 79565, 127304, 159130, 254608, 318260, 509216, 636520, 1018432, 1273040, 2036864, 2546080, 4073728, 5092160, 10184320, 20368640]

約数ペア:

[(1, 20368640), (2, 10184320), (4, 5092160), (5, 4073728), (8, 2546080), (10, 2036864), (16, 1273040), (20, 1018432), (32, 636520), (40, 509216), (64, 318260), (80, 254608), (128, 159130), (160, 127304), (256, 79565), (320, 63652), (640, 31826), (1280, 15913)]