21370365

素因数分解:

$3^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{509}}^1$

素因数の和:834

約数の個数: 32

約数和(自身を含む): 38188800

約数和(自身を除く): 16818435

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 311, 509, 933, 1527, 1555, 2545, 2799, 4581, 4665, 7635, 8397, 13743, 13995, 22905, 41985, 68715, 158299, 474897, 791495, 1424691, 2374485, 4274073, 7123455, 21370365]

約数ペア:

[(1, 21370365), (3, 7123455), (5, 4274073), (9, 2374485), (15, 1424691), (27, 791495), (45, 474897), (135, 158299), (311, 68715), (509, 41985), (933, 22905), (1527, 13995), (1555, 13743), (2545, 8397), (2799, 7635), (4581, 4665)]