19977502

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{229}}^1\times {\mathrm{823}}^1$

素因数の和:1107

約数の個数: 16

約数和(自身を含む): 30702240

約数和(自身を除く): 10724738

約数列:

[1, 2, 53, 106, 229, 458, 823, 1646, 12137, 24274, 43619, 87238, 188467, 376934, 9988751, 19977502]

約数ペア:

[(1, 19977502), (2, 9988751), (53, 376934), (106, 188467), (229, 87238), (458, 43619), (823, 24274), (1646, 12137)]