21677680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8741}}^1$

素因数の和:8785

約数の個数: 40

約数和(自身を含む): 52032384

約数和(自身を除く): 30354704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8741, 17482, 34964, 43705, 69928, 87410, 139856, 174820, 270971, 349640, 541942, 699280, 1083884, 1354855, 2167768, 2709710, 4335536, 5419420, 10838840, 21677680]

約数ペア:

[(1, 21677680), (2, 10838840), (4, 5419420), (5, 4335536), (8, 2709710), (10, 2167768), (16, 1354855), (20, 1083884), (31, 699280), (40, 541942), (62, 349640), (80, 270971), (124, 174820), (155, 139856), (248, 87410), (310, 69928), (496, 43705), (620, 34964), (1240, 17482), (2480, 8741)]