20993765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{191}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 8036635

約数列:

[1, 5, 13, 19, 65, 89, 95, 191, 247, 445, 955, 1157, 1235, 1691, 2483, 3629, 5785, 8455, 12415, 16999, 18145, 21983, 47177, 84995, 109915, 220987, 235885, 322981, 1104935, 1614905, 4198753, 20993765]

約数ペア:

[(1, 20993765), (5, 4198753), (13, 1614905), (19, 1104935), (65, 322981), (89, 235885), (95, 220987), (191, 109915), (247, 84995), (445, 47177), (955, 21983), (1157, 18145), (1235, 16999), (1691, 12415), (2483, 8455), (3629, 5785)]