21253700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16349}}^1$

素因数の和:16376

約数の個数: 36

約数和(自身を含む): 49671300

約数和(自身を除く): 28417600

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16349, 32698, 65396, 81745, 163490, 212537, 326980, 408725, 425074, 817450, 850148, 1062685, 1634900, 2125370, 4250740, 5313425, 10626850, 21253700]

約数ペア:

[(1, 21253700), (2, 10626850), (4, 5313425), (5, 4250740), (10, 2125370), (13, 1634900), (20, 1062685), (25, 850148), (26, 817450), (50, 425074), (52, 408725), (65, 326980), (100, 212537), (130, 163490), (260, 81745), (325, 65396), (650, 32698), (1300, 16349)]