21821560

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1777}}^1$

素因数の和:2095

約数の個数: 32

約数和(自身を含む): 49286160

約数和(自身を除く): 27464600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 1777, 2456, 3070, 3554, 6140, 7108, 8885, 12280, 14216, 17770, 35540, 71080, 545539, 1091078, 2182156, 2727695, 4364312, 5455390, 10910780, 21821560]

約数ペア:

[(1, 21821560), (2, 10910780), (4, 5455390), (5, 4364312), (8, 2727695), (10, 2182156), (20, 1091078), (40, 545539), (307, 71080), (614, 35540), (1228, 17770), (1535, 14216), (1777, 12280), (2456, 8885), (3070, 7108), (3554, 6140)]