21175155

素因数分解:

$3^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1553}}^1$

素因数の和:1668

約数の個数: 32

約数和(自身を含む): 38041920

約数和(自身を除く): 16866765

約数列:

[1, 3, 5, 9, 15, 27, 45, 101, 135, 303, 505, 909, 1515, 1553, 2727, 4545, 4659, 7765, 13635, 13977, 23295, 41931, 69885, 156853, 209655, 470559, 784265, 1411677, 2352795, 4235031, 7058385, 21175155]

約数ペア:

[(1, 21175155), (3, 7058385), (5, 4235031), (9, 2352795), (15, 1411677), (27, 784265), (45, 470559), (101, 209655), (135, 156853), (303, 69885), (505, 41931), (909, 23295), (1515, 13977), (1553, 13635), (2727, 7765), (4545, 4659)]