20741525

素因数分解:

$5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:174

約数の個数: 48

約数和(自身を含む): 31367040

約数和(自身を除く): 10625515

約数列:

[1, 5, 7, 25, 29, 35, 61, 67, 145, 175, 203, 305, 335, 427, 469, 725, 1015, 1525, 1675, 1769, 1943, 2135, 2345, 4087, 5075, 8845, 9715, 10675, 11725, 12383, 13601, 20435, 28609, 44225, 48575, 61915, 68005, 102175, 118523, 143045, 309575, 340025, 592615, 715225, 829661, 2963075, 4148305, 20741525]

約数ペア:

[(1, 20741525), (5, 4148305), (7, 2963075), (25, 829661), (29, 715225), (35, 592615), (61, 340025), (67, 309575), (145, 143045), (175, 118523), (203, 102175), (305, 68005), (335, 61915), (427, 48575), (469, 44225), (725, 28609), (1015, 20435), (1525, 13601), (1675, 12383), (1769, 11725), (1943, 10675), (2135, 9715), (2345, 8845), (4087, 5075)]