21528339

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{269}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 34145280

約数和(自身を除く): 12616941

約数列:

[1, 3, 7, 21, 37, 103, 111, 259, 269, 309, 721, 777, 807, 1883, 2163, 3811, 5649, 9953, 11433, 26677, 27707, 29859, 69671, 80031, 83121, 193949, 209013, 581847, 1025159, 3075477, 7176113, 21528339]

約数ペア:

[(1, 21528339), (3, 7176113), (7, 3075477), (21, 1025159), (37, 581847), (103, 209013), (111, 193949), (259, 83121), (269, 80031), (309, 69671), (721, 29859), (777, 27707), (807, 26677), (1883, 11433), (2163, 9953), (3811, 5649)]