21185825

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{631}}^1$

素因数の和:737

約数の個数: 24

約数和(自身を含む): 28212480

約数和(自身を除く): 7026655

約数列:

[1, 5, 17, 25, 79, 85, 395, 425, 631, 1343, 1975, 3155, 6715, 10727, 15775, 33575, 49849, 53635, 249245, 268175, 847433, 1246225, 4237165, 21185825]

約数ペア:

[(1, 21185825), (5, 4237165), (17, 1246225), (25, 847433), (79, 268175), (85, 249245), (395, 53635), (425, 49849), (631, 33575), (1343, 15775), (1975, 10727), (3155, 6715)]