21784816

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{263}}^1$

素因数の和:469

約数の個数: 40

約数和(自身を含む): 43997184

約数和(自身を除く): 22212368

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 167, 248, 263, 334, 496, 526, 668, 1052, 1336, 2104, 2672, 4208, 5177, 8153, 10354, 16306, 20708, 32612, 41416, 43921, 65224, 82832, 87842, 130448, 175684, 351368, 702736, 1361551, 2723102, 5446204, 10892408, 21784816]

約数ペア:

[(1, 21784816), (2, 10892408), (4, 5446204), (8, 2723102), (16, 1361551), (31, 702736), (62, 351368), (124, 175684), (167, 130448), (248, 87842), (263, 82832), (334, 65224), (496, 43921), (526, 41416), (668, 32612), (1052, 20708), (1336, 16306), (2104, 10354), (2672, 8153), (4208, 5177)]