21167708560

素因数分解:

$2^4\times 5^1\times {\mathrm{367}}^1\times {\mathrm{720971}}^1$

素因数の和:721351

約数の個数: 40

約数和(自身を含む): 49349091456

約数和(自身を除く): 28181382896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 367, 734, 1468, 1835, 2936, 3670, 5872, 7340, 14680, 29360, 720971, 1441942, 2883884, 3604855, 5767768, 7209710, 11535536, 14419420, 28838840, 57677680, 264596357, 529192714, 1058385428, 1322981785, 2116770856, 2645963570, 4233541712, 5291927140, 10583854280, 21167708560]

約数ペア:

[(1, 21167708560), (2, 10583854280), (4, 5291927140), (5, 4233541712), (8, 2645963570), (10, 2116770856), (16, 1322981785), (20, 1058385428), (40, 529192714), (80, 264596357), (367, 57677680), (734, 28838840), (1468, 14419420), (1835, 11535536), (2936, 7209710), (3670, 5767768), (5872, 3604855), (7340, 2883884), (14680, 1441942), (29360, 720971)]