21897280

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1669}}^1$

素因数の和:1727

約数の個数: 56

約数和(自身を含む): 53446680

約数和(自身を除く): 31549400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1640, 1669, 2624, 3280, 3338, 6560, 6676, 8345, 13120, 13352, 16690, 26704, 33380, 53408, 66760, 68429, 106816, 133520, 136858, 267040, 273716, 342145, 534080, 547432, 684290, 1094864, 1368580, 2189728, 2737160, 4379456, 5474320, 10948640, 21897280]

約数ペア:

[(1, 21897280), (2, 10948640), (4, 5474320), (5, 4379456), (8, 2737160), (10, 2189728), (16, 1368580), (20, 1094864), (32, 684290), (40, 547432), (41, 534080), (64, 342145), (80, 273716), (82, 267040), (160, 136858), (164, 133520), (205, 106816), (320, 68429), (328, 66760), (410, 53408), (656, 33380), (820, 26704), (1312, 16690), (1640, 13352), (1669, 13120), (2624, 8345), (3280, 6676), (3338, 6560)]