20758213

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{163}}^1$

素因数の和:313

約数の個数: 24

約数和(自身を含む): 25576128

約数和(自身を除く): 4817915

約数列:

[1, 7, 23, 49, 113, 161, 163, 791, 1127, 1141, 2599, 3749, 5537, 7987, 18193, 18419, 26243, 127351, 128933, 183701, 423637, 902531, 2965459, 20758213]

約数ペア:

[(1, 20758213), (7, 2965459), (23, 902531), (49, 423637), (113, 183701), (161, 128933), (163, 127351), (791, 26243), (1127, 18419), (1141, 18193), (2599, 7987), (3749, 5537)]