20651639127

素因数分解:

$3^1\times 7^2\times {\mathrm{379}}^1\times {\mathrm{370679}}^1$

素因数の和:371075

約数の個数: 24

約数和(自身を含む): 32115715200

約数和(自身を除く): 11464076073

約数列:

[1, 3, 7, 21, 49, 147, 379, 1137, 2653, 7959, 18571, 55713, 370679, 1112037, 2594753, 7784259, 18163271, 54489813, 140487341, 421462023, 983411387, 2950234161, 6883879709, 20651639127]

約数ペア:

[(1, 20651639127), (3, 6883879709), (7, 2950234161), (21, 983411387), (49, 421462023), (147, 140487341), (379, 54489813), (1137, 18163271), (2653, 7784259), (7959, 2594753), (18571, 1112037), (55713, 370679)]