21218360

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{929}}^1$

素因数の和:1511

約数の個数: 32

約数和(自身を含む): 47876400

約数和(自身を除く): 26658040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 929, 1142, 1858, 2284, 2855, 3716, 4568, 4645, 5710, 7432, 9290, 11420, 18580, 22840, 37160, 530459, 1060918, 2121836, 2652295, 4243672, 5304590, 10609180, 21218360]

約数ペア:

[(1, 21218360), (2, 10609180), (4, 5304590), (5, 4243672), (8, 2652295), (10, 2121836), (20, 1060918), (40, 530459), (571, 37160), (929, 22840), (1142, 18580), (1858, 11420), (2284, 9290), (2855, 7432), (3716, 5710), (4568, 4645)]