80789620

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{66221}}^1$

素因数の和:66291

約数の個数: 24

約数和(自身を含む): 172442088

約数和(自身を除く): 91652468

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 66221, 132442, 264884, 331105, 662210, 1324420, 4039481, 8078962, 16157924, 20197405, 40394810, 80789620]

約数ペア:

[(1, 80789620), (2, 40394810), (4, 20197405), (5, 16157924), (10, 8078962), (20, 4039481), (61, 1324420), (122, 662210), (244, 331105), (305, 264884), (610, 132442), (1220, 66221)]