21127160

素因数分解:

$2^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1949}}^1$

素因数の和:2231

約数の個数: 32

約数和(自身を含む): 47736000

約数和(自身を除く): 26608840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 271, 542, 1084, 1355, 1949, 2168, 2710, 3898, 5420, 7796, 9745, 10840, 15592, 19490, 38980, 77960, 528179, 1056358, 2112716, 2640895, 4225432, 5281790, 10563580, 21127160]

約数ペア:

[(1, 21127160), (2, 10563580), (4, 5281790), (5, 4225432), (8, 2640895), (10, 2112716), (20, 1056358), (40, 528179), (271, 77960), (542, 38980), (1084, 19490), (1355, 15592), (1949, 10840), (2168, 9745), (2710, 7796), (3898, 5420)]