21684299

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 7055797

約数列:

[1, 7, 13, 17, 91, 107, 119, 131, 221, 749, 917, 1391, 1547, 1703, 1819, 2227, 9737, 11921, 12733, 14017, 15589, 23647, 28951, 98119, 165529, 182221, 202657, 238289, 1275547, 1668023, 3097757, 21684299]

約数ペア:

[(1, 21684299), (7, 3097757), (13, 1668023), (17, 1275547), (91, 238289), (107, 202657), (119, 182221), (131, 165529), (221, 98119), (749, 28951), (917, 23647), (1391, 15589), (1547, 14017), (1703, 12733), (1819, 11921), (2227, 9737)]