21946480

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6691}}^1$

素因数の和:6745

約数の個数: 40

約数和(自身を含む): 52277904

約数和(自身を除く): 30331424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6691, 13382, 26764, 33455, 53528, 66910, 107056, 133820, 267640, 274331, 535280, 548662, 1097324, 1371655, 2194648, 2743310, 4389296, 5486620, 10973240, 21946480]

約数ペア:

[(1, 21946480), (2, 10973240), (4, 5486620), (5, 4389296), (8, 2743310), (10, 2194648), (16, 1371655), (20, 1097324), (40, 548662), (41, 535280), (80, 274331), (82, 267640), (164, 133820), (205, 107056), (328, 66910), (410, 53528), (656, 33455), (820, 26764), (1640, 13382), (3280, 6691)]