21504915

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28111}}^1$

素因数の和:28139

約数の個数: 24

約数和(自身を含む): 39469248

約数和(自身を除く): 17964333

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28111, 84333, 140555, 252999, 421665, 477887, 1264995, 1433661, 2389435, 4300983, 7168305, 21504915]

約数ペア:

[(1, 21504915), (3, 7168305), (5, 4300983), (9, 2389435), (15, 1433661), (17, 1264995), (45, 477887), (51, 421665), (85, 252999), (153, 140555), (255, 84333), (765, 28111)]