19964240

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1531}}^1$

素因数の和:1707

約数の個数: 40

約数和(自身を含む): 46732128

約数和(自身を除く): 26767888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1531, 1630, 2608, 3062, 3260, 6124, 6520, 7655, 12248, 13040, 15310, 24496, 30620, 61240, 122480, 249553, 499106, 998212, 1247765, 1996424, 2495530, 3992848, 4991060, 9982120, 19964240]

約数ペア:

[(1, 19964240), (2, 9982120), (4, 4991060), (5, 3992848), (8, 2495530), (10, 1996424), (16, 1247765), (20, 998212), (40, 499106), (80, 249553), (163, 122480), (326, 61240), (652, 30620), (815, 24496), (1304, 15310), (1531, 13040), (1630, 12248), (2608, 7655), (3062, 6520), (3260, 6124)]