645036220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1040381}}^1$

素因数の和:1040421

約数の個数: 24

約数和(自身を含む): 1398273408

約数和(自身を除く): 753237188

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 1040381, 2080762, 4161524, 5201905, 10403810, 20807620, 32251811, 64503622, 129007244, 161259055, 322518110, 645036220]

約数ペア:

[(1, 645036220), (2, 322518110), (4, 161259055), (5, 129007244), (10, 64503622), (20, 32251811), (31, 20807620), (62, 10403810), (124, 5201905), (155, 4161524), (310, 2080762), (620, 1040381)]