21388190

素因数分解:

$2^1\times 5^1\times {\mathrm{269}}^1\times {\mathrm{7951}}^1$

素因数の和:8227

約数の個数: 16

約数和(自身を含む): 38646720

約数和(自身を除く): 17258530

約数列:

[1, 2, 5, 10, 269, 538, 1345, 2690, 7951, 15902, 39755, 79510, 2138819, 4277638, 10694095, 21388190]

約数ペア:

[(1, 21388190), (2, 10694095), (5, 4277638), (10, 2138819), (269, 79510), (538, 39755), (1345, 15902), (2690, 7951)]