21208725

素因数分解:

$3^2\times 5^2\times {\mathrm{94261}}^1$

素因数の和:94277

約数の個数: 18

約数和(自身を含む): 37987586

約数和(自身を除く): 16778861

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 94261, 282783, 471305, 848349, 1413915, 2356525, 4241745, 7069575, 21208725]

約数ペア:

[(1, 21208725), (3, 7069575), (5, 4241745), (9, 2356525), (15, 1413915), (25, 848349), (45, 471305), (75, 282783), (225, 94261)]