20812215

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{787}}^1$

素因数の和:879

約数の個数: 32

約数和(自身を含む): 34949376

約数和(自身を除く): 14137161

約数列:

[1, 3, 5, 15, 41, 43, 123, 129, 205, 215, 615, 645, 787, 1763, 2361, 3935, 5289, 8815, 11805, 26445, 32267, 33841, 96801, 101523, 161335, 169205, 484005, 507615, 1387481, 4162443, 6937405, 20812215]

約数ペア:

[(1, 20812215), (3, 6937405), (5, 4162443), (15, 1387481), (41, 507615), (43, 484005), (123, 169205), (129, 161335), (205, 101523), (215, 96801), (615, 33841), (645, 32267), (787, 26445), (1763, 11805), (2361, 8815), (3935, 5289)]