21098740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4271}}^1$

素因数の和:4312

約数の個数: 48

約数和(自身を含む): 50238720

約数和(自身を除く): 29139980

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4271, 4940, 8542, 17084, 21355, 42710, 55523, 81149, 85420, 111046, 162298, 222092, 277615, 324596, 405745, 555230, 811490, 1054937, 1110460, 1622980, 2109874, 4219748, 5274685, 10549370, 21098740]

約数ペア:

[(1, 21098740), (2, 10549370), (4, 5274685), (5, 4219748), (10, 2109874), (13, 1622980), (19, 1110460), (20, 1054937), (26, 811490), (38, 555230), (52, 405745), (65, 324596), (76, 277615), (95, 222092), (130, 162298), (190, 111046), (247, 85420), (260, 81149), (380, 55523), (494, 42710), (988, 21355), (1235, 17084), (2470, 8542), (4271, 4940)]