21526840

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1753}}^1$

素因数の和:2071

約数の個数: 32

約数和(自身を含む): 48620880

約数和(自身を除く): 27094040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 1753, 2456, 3070, 3506, 6140, 7012, 8765, 12280, 14024, 17530, 35060, 70120, 538171, 1076342, 2152684, 2690855, 4305368, 5381710, 10763420, 21526840]

約数ペア:

[(1, 21526840), (2, 10763420), (4, 5381710), (5, 4305368), (8, 2690855), (10, 2152684), (20, 1076342), (40, 538171), (307, 70120), (614, 35060), (1228, 17530), (1535, 14024), (1753, 12280), (2456, 8765), (3070, 7012), (3506, 6140)]