21780075

素因数分解:

$3^1\times 5^2\times {\mathrm{149}}^1\times {\mathrm{1949}}^1$

素因数の和:2111

約数の個数: 24

約数和(自身を含む): 36270000

約数和(自身を除く): 14489925

約数列:

[1, 3, 5, 15, 25, 75, 149, 447, 745, 1949, 2235, 3725, 5847, 9745, 11175, 29235, 48725, 146175, 290401, 871203, 1452005, 4356015, 7260025, 21780075]

約数ペア:

[(1, 21780075), (3, 7260025), (5, 4356015), (15, 1452005), (25, 871203), (75, 290401), (149, 146175), (447, 48725), (745, 29235), (1949, 11175), (2235, 9745), (3725, 5847)]