21332816

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{307}}^1$

素因数の和:459

約数の個数: 40

約数和(自身を含む): 42851424

約数和(自身を除く): 21518608

約数列:

[1, 2, 4, 8, 16, 43, 86, 101, 172, 202, 307, 344, 404, 614, 688, 808, 1228, 1616, 2456, 4343, 4912, 8686, 13201, 17372, 26402, 31007, 34744, 52804, 62014, 69488, 105608, 124028, 211216, 248056, 496112, 1333301, 2666602, 5333204, 10666408, 21332816]

約数ペア:

[(1, 21332816), (2, 10666408), (4, 5333204), (8, 2666602), (16, 1333301), (43, 496112), (86, 248056), (101, 211216), (172, 124028), (202, 105608), (307, 69488), (344, 62014), (404, 52804), (614, 34744), (688, 31007), (808, 26402), (1228, 17372), (1616, 13201), (2456, 8686), (4343, 4912)]