21005055

素因数分解:

$3^3\times 5^1\times {\mathrm{155593}}^1$

素因数の和:155607

約数の個数: 16

約数和(自身を含む): 37342560

約数和(自身を除く): 16337505

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155593, 466779, 777965, 1400337, 2333895, 4201011, 7001685, 21005055]

約数ペア:

[(1, 21005055), (3, 7001685), (5, 4201011), (9, 2333895), (15, 1400337), (27, 777965), (45, 466779), (135, 155593)]