20494040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1381}}^1$

素因数の和:1452

約数の個数: 64

約数和(自身を含む): 53732160

約数和(自身を除く): 33238120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 53, 56, 70, 106, 140, 212, 265, 280, 371, 424, 530, 742, 1060, 1381, 1484, 1855, 2120, 2762, 2968, 3710, 5524, 6905, 7420, 9667, 11048, 13810, 14840, 19334, 27620, 38668, 48335, 55240, 73193, 77336, 96670, 146386, 193340, 292772, 365965, 386680, 512351, 585544, 731930, 1024702, 1463860, 2049404, 2561755, 2927720, 4098808, 5123510, 10247020, 20494040]

約数ペア:

[(1, 20494040), (2, 10247020), (4, 5123510), (5, 4098808), (7, 2927720), (8, 2561755), (10, 2049404), (14, 1463860), (20, 1024702), (28, 731930), (35, 585544), (40, 512351), (53, 386680), (56, 365965), (70, 292772), (106, 193340), (140, 146386), (212, 96670), (265, 77336), (280, 73193), (371, 55240), (424, 48335), (530, 38668), (742, 27620), (1060, 19334), (1381, 14840), (1484, 13810), (1855, 11048), (2120, 9667), (2762, 7420), (2968, 6905), (3710, 5524)]