21988945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{541}}^1\times {\mathrm{739}}^1$

素因数の和:1296

約数の個数: 16

約数和(自身を含む): 28877760

約数和(自身を除く): 6888815

約数列:

[1, 5, 11, 55, 541, 739, 2705, 3695, 5951, 8129, 29755, 40645, 399799, 1998995, 4397789, 21988945]

約数ペア:

[(1, 21988945), (5, 4397789), (11, 1998995), (55, 399799), (541, 40645), (739, 29755), (2705, 8129), (3695, 5951)]