21118455

素因数分解:

$3^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{503}}^1$

素因数の和:828

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 16621065

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 311, 503, 933, 1509, 1555, 2515, 2799, 4527, 4665, 7545, 8397, 13581, 13995, 22635, 41985, 67905, 156433, 469299, 782165, 1407897, 2346495, 4223691, 7039485, 21118455]

約数ペア:

[(1, 21118455), (3, 7039485), (5, 4223691), (9, 2346495), (15, 1407897), (27, 782165), (45, 469299), (135, 156433), (311, 67905), (503, 41985), (933, 22635), (1509, 13995), (1555, 13581), (2515, 8397), (2799, 7545), (4527, 4665)]