15900521

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 20901888

約数和(自身を除く): 5001367

約数列:

[1, 7, 13, 23, 71, 91, 107, 161, 299, 497, 749, 923, 1391, 1633, 2093, 2461, 6461, 7597, 9737, 11431, 17227, 21229, 31993, 53179, 98761, 148603, 174731, 223951, 691327, 1223117, 2271503, 15900521]

約数ペア:

[(1, 15900521), (7, 2271503), (13, 1223117), (23, 691327), (71, 223951), (91, 174731), (107, 148603), (161, 98761), (299, 53179), (497, 31993), (749, 21229), (923, 17227), (1391, 11431), (1633, 9737), (2093, 7597), (2461, 6461)]