28901990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{222323}}^1$

素因数の和:222343

約数の個数: 16

約数和(自身を含む): 56025648

約数和(自身を除く): 27123658

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 222323, 444646, 1111615, 2223230, 2890199, 5780398, 14450995, 28901990]

約数ペア:

[(1, 28901990), (2, 14450995), (5, 5780398), (10, 2890199), (13, 2223230), (26, 1111615), (65, 444646), (130, 222323)]