20651355

素因数分解:

$3^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{739}}^1$

素因数の和:782

約数の個数: 48

約数和(自身を含む): 38787840

約数和(自身を除く): 18136485

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 345, 405, 621, 739, 1035, 1215, 1863, 2217, 3105, 3695, 5589, 6651, 9315, 11085, 16997, 19953, 27945, 33255, 50991, 59859, 84985, 99765, 152973, 179577, 254955, 299295, 458919, 764865, 897885, 1376757, 2294595, 4130271, 6883785, 20651355]

約数ペア:

[(1, 20651355), (3, 6883785), (5, 4130271), (9, 2294595), (15, 1376757), (23, 897885), (27, 764865), (45, 458919), (69, 299295), (81, 254955), (115, 179577), (135, 152973), (207, 99765), (243, 84985), (345, 59859), (405, 50991), (621, 33255), (739, 27945), (1035, 19953), (1215, 16997), (1863, 11085), (2217, 9315), (3105, 6651), (3695, 5589)]