20671880

素因数分解:

$2^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1907}}^1$

素因数の和:2189

約数の個数: 32

約数和(自身を含む): 46707840

約数和(自身を除く): 26035960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 271, 542, 1084, 1355, 1907, 2168, 2710, 3814, 5420, 7628, 9535, 10840, 15256, 19070, 38140, 76280, 516797, 1033594, 2067188, 2583985, 4134376, 5167970, 10335940, 20671880]

約数ペア:

[(1, 20671880), (2, 10335940), (4, 5167970), (5, 4134376), (8, 2583985), (10, 2067188), (20, 1033594), (40, 516797), (271, 76280), (542, 38140), (1084, 19070), (1355, 15256), (1907, 10840), (2168, 9535), (2710, 7628), (3814, 5420)]