21368925

素因数分解:

$3^2\times 5^2\times {\mathrm{73}}^1\times {\mathrm{1301}}^1$

素因数の和:1390

約数の個数: 36

約数和(自身を含む): 38828244

約数和(自身を除く): 17459319

約数列:

[1, 3, 5, 9, 15, 25, 45, 73, 75, 219, 225, 365, 657, 1095, 1301, 1825, 3285, 3903, 5475, 6505, 11709, 16425, 19515, 32525, 58545, 94973, 97575, 284919, 292725, 474865, 854757, 1424595, 2374325, 4273785, 7122975, 21368925]

約数ペア:

[(1, 21368925), (3, 7122975), (5, 4273785), (9, 2374325), (15, 1424595), (25, 854757), (45, 474865), (73, 292725), (75, 284919), (219, 97575), (225, 94973), (365, 58545), (657, 32525), (1095, 19515), (1301, 16425), (1825, 11709), (3285, 6505), (3903, 5475)]