21688960

素因数分解:

$2^7\times 5^1\times {\mathrm{33889}}^1$

素因数の和:33908

約数の個数: 32

約数和(自身を含む): 51851700

約数和(自身を除く): 30162740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33889, 67778, 135556, 169445, 271112, 338890, 542224, 677780, 1084448, 1355560, 2168896, 2711120, 4337792, 5422240, 10844480, 21688960]

約数ペア:

[(1, 21688960), (2, 10844480), (4, 5422240), (5, 4337792), (8, 2711120), (10, 2168896), (16, 1355560), (20, 1084448), (32, 677780), (40, 542224), (64, 338890), (80, 271112), (128, 169445), (160, 135556), (320, 67778), (640, 33889)]