21370905

素因数分解:

$3^3\times 5^1\times {\mathrm{158303}}^1$

素因数の和:158317

約数の個数: 16

約数和(自身を含む): 37992960

約数和(自身を除く): 16622055

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 158303, 474909, 791515, 1424727, 2374545, 4274181, 7123635, 21370905]

約数ペア:

[(1, 21370905), (3, 7123635), (5, 4274181), (9, 2374545), (15, 1424727), (27, 791515), (45, 474909), (135, 158303)]