21112209

素因数分解:

$3^2\times {\mathrm{31}}^2\times {\mathrm{2441}}^1$

素因数の和:2509

約数の個数: 18

約数和(自身を含む): 31523778

約数和(自身を除く): 10411569

約数列:

[1, 3, 9, 31, 93, 279, 961, 2441, 2883, 7323, 8649, 21969, 75671, 227013, 681039, 2345801, 7037403, 21112209]

約数ペア:

[(1, 21112209), (3, 7037403), (9, 2345801), (31, 681039), (93, 227013), (279, 75671), (961, 21969), (2441, 8649), (2883, 7323)]