21007715

素因数分解:

$5^1\times {\mathrm{83}}^1\times {\mathrm{223}}^1\times {\mathrm{227}}^1$

素因数の和:538

約数の個数: 16

約数和(自身を含む): 25740288

約数和(自身を除く): 4732573

約数列:

[1, 5, 83, 223, 227, 415, 1115, 1135, 18509, 18841, 50621, 92545, 94205, 253105, 4201543, 21007715]

約数ペア:

[(1, 21007715), (5, 4201543), (83, 253105), (223, 94205), (227, 92545), (415, 50621), (1115, 18841), (1135, 18509)]