21707055

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6991}}^1$

素因数の和:7028

約数の個数: 32

約数和(自身を含む): 40273920

約数和(自身を除く): 18566865

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6991, 20973, 34955, 62919, 104865, 160793, 188757, 314595, 482379, 803965, 943785, 1447137, 2411895, 4341411, 7235685, 21707055]

約数ペア:

[(1, 21707055), (3, 7235685), (5, 4341411), (9, 2411895), (15, 1447137), (23, 943785), (27, 803965), (45, 482379), (69, 314595), (115, 188757), (135, 160793), (207, 104865), (345, 62919), (621, 34955), (1035, 20973), (3105, 6991)]