21057915

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{48409}}^1$

素因数の和:48446

約数の個数: 16

約数和(自身を含む): 34855200

約数和(自身を除く): 13797285

約数列:

[1, 3, 5, 15, 29, 87, 145, 435, 48409, 145227, 242045, 726135, 1403861, 4211583, 7019305, 21057915]

約数ペア:

[(1, 21057915), (3, 7019305), (5, 4211583), (15, 1403861), (29, 726135), (87, 242045), (145, 145227), (435, 48409)]