28820525

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{3989}}^1$

素因数の和:4033

約数の個数: 18

約数和(自身を含む): 37972830

約数和(自身を除く): 9152305

約数列:

[1, 5, 17, 25, 85, 289, 425, 1445, 3989, 7225, 19945, 67813, 99725, 339065, 1152821, 1695325, 5764105, 28820525]

約数ペア:

[(1, 28820525), (5, 5764105), (17, 1695325), (25, 1152821), (85, 339065), (289, 99725), (425, 67813), (1445, 19945), (3989, 7225)]