12723020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{20521}}^1$

素因数の和:20561

約数の個数: 24

約数和(自身を含む): 27581568

約数和(自身を除く): 14858548

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 20521, 41042, 82084, 102605, 205210, 410420, 636151, 1272302, 2544604, 3180755, 6361510, 12723020]

約数ペア:

[(1, 12723020), (2, 6361510), (4, 3180755), (5, 2544604), (10, 1272302), (20, 636151), (31, 410420), (62, 205210), (124, 102605), (155, 82084), (310, 41042), (620, 20521)]