427220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{521}}^1$

素因数の和:571

約数の個数: 24

約数和(自身を含む): 920808

約数和(自身を除く): 493588

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 521, 820, 1042, 2084, 2605, 5210, 10420, 21361, 42722, 85444, 106805, 213610, 427220]

約数ペア:

[(1, 427220), (2, 213610), (4, 106805), (5, 85444), (10, 42722), (20, 21361), (41, 10420), (82, 5210), (164, 2605), (205, 2084), (410, 1042), (521, 820)]