25781990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{198323}}^1$

素因数の和:198343

約数の個数: 16

約数和(自身を含む): 49977648

約数和(自身を除く): 24195658

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 198323, 396646, 991615, 1983230, 2578199, 5156398, 12890995, 25781990]

約数ペア:

[(1, 25781990), (2, 12890995), (5, 5156398), (10, 2578199), (13, 1983230), (26, 991615), (65, 396646), (130, 198323)]