21291705

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10067}}^1$

素因数の和:10125

約数の個数: 24

約数和(自身を含む): 37694592

約数和(自身を除く): 16402887

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 10067, 30201, 50335, 90603, 151005, 453015, 473149, 1419447, 2365745, 4258341, 7097235, 21291705]

約数ペア:

[(1, 21291705), (3, 7097235), (5, 4258341), (9, 2365745), (15, 1419447), (45, 473149), (47, 453015), (141, 151005), (235, 90603), (423, 50335), (705, 30201), (2115, 10067)]