21420638

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{9241}}^1$

素因数の和:9323

約数の個数: 16

約数和(自身を含む): 34380240

約数和(自身を除く): 12959602

約数列:

[1, 2, 19, 38, 61, 122, 1159, 2318, 9241, 18482, 175579, 351158, 563701, 1127402, 10710319, 21420638]

約数ペア:

[(1, 21420638), (2, 10710319), (19, 1127402), (38, 563701), (61, 351158), (122, 175579), (1159, 18482), (2318, 9241)]