18756985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:217

約数の個数: 32

約数和(自身を含む): 25361280

約数和(自身を除く): 6604295

約数列:

[1, 5, 13, 59, 65, 67, 73, 295, 335, 365, 767, 871, 949, 3835, 3953, 4307, 4355, 4745, 4891, 19765, 21535, 24455, 51389, 55991, 63583, 256945, 279955, 288569, 317915, 1442845, 3751397, 18756985]

約数ペア:

[(1, 18756985), (5, 3751397), (13, 1442845), (59, 317915), (65, 288569), (67, 279955), (73, 256945), (295, 63583), (335, 55991), (365, 51389), (767, 24455), (871, 21535), (949, 19765), (3835, 4891), (3953, 4745), (4307, 4355)]