81119020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{66491}}^1$

素因数の和:66561

約数の個数: 24

約数和(自身を含む): 173145168

約数和(自身を除く): 92026148

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 66491, 132982, 265964, 332455, 664910, 1329820, 4055951, 8111902, 16223804, 20279755, 40559510, 81119020]

約数ペア:

[(1, 81119020), (2, 40559510), (4, 20279755), (5, 16223804), (10, 8111902), (20, 4055951), (61, 1329820), (122, 664910), (244, 332455), (305, 265964), (610, 132982), (1220, 66491)]