20991216

素因数分解:

$2^4\times 3^1\times {\mathrm{31}}^1\times {\mathrm{14107}}^1$

素因数の和:14149

約数の個数: 40

約数和(自身を含む): 55980544

約数和(自身を除く): 34989328

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 31, 48, 62, 93, 124, 186, 248, 372, 496, 744, 1488, 14107, 28214, 42321, 56428, 84642, 112856, 169284, 225712, 338568, 437317, 677136, 874634, 1311951, 1749268, 2623902, 3498536, 5247804, 6997072, 10495608, 20991216]

約数ペア:

[(1, 20991216), (2, 10495608), (3, 6997072), (4, 5247804), (6, 3498536), (8, 2623902), (12, 1749268), (16, 1311951), (24, 874634), (31, 677136), (48, 437317), (62, 338568), (93, 225712), (124, 169284), (186, 112856), (248, 84642), (372, 56428), (496, 42321), (744, 28214), (1488, 14107)]