21784185

素因数分解:

$3^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4793}}^1$

素因数の和:4905

約数の個数: 24

約数和(自身を含む): 38141064

約数和(自身を除く): 16356879

約数列:

[1, 3, 5, 9, 15, 45, 101, 303, 505, 909, 1515, 4545, 4793, 14379, 23965, 43137, 71895, 215685, 484093, 1452279, 2420465, 4356837, 7261395, 21784185]

約数ペア:

[(1, 21784185), (3, 7261395), (5, 4356837), (9, 2420465), (15, 1452279), (45, 484093), (101, 215685), (303, 71895), (505, 43137), (909, 23965), (1515, 14379), (4545, 4793)]