78424420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{126491}}^1$

素因数の和:126531

約数の個数: 24

約数和(自身を含む): 170005248

約数和(自身を除く): 91580828

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 126491, 252982, 505964, 632455, 1264910, 2529820, 3921221, 7842442, 15684884, 19606105, 39212210, 78424420]

約数ペア:

[(1, 78424420), (2, 39212210), (4, 19606105), (5, 15684884), (10, 7842442), (20, 3921221), (31, 2529820), (62, 1264910), (124, 632455), (155, 505964), (310, 252982), (620, 126491)]