20128815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{63901}}^1$

素因数の和:63919

約数の個数: 24

約数和(自身を含む): 39874848

約数和(自身を除く): 19746033

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 63901, 191703, 319505, 447307, 575109, 958515, 1341921, 2236535, 2875545, 4025763, 6709605, 20128815]

約数ペア:

[(1, 20128815), (3, 6709605), (5, 4025763), (7, 2875545), (9, 2236535), (15, 1341921), (21, 958515), (35, 575109), (45, 447307), (63, 319505), (105, 191703), (315, 63901)]