21087980

素因数分解:

$2^2\times 5^1\times {\mathrm{383}}^1\times {\mathrm{2753}}^1$

素因数の和:3145

約数の個数: 24

約数和(自身を含む): 44416512

約数和(自身を除く): 23328532

約数列:

[1, 2, 4, 5, 10, 20, 383, 766, 1532, 1915, 2753, 3830, 5506, 7660, 11012, 13765, 27530, 55060, 1054399, 2108798, 4217596, 5271995, 10543990, 21087980]

約数ペア:

[(1, 21087980), (2, 10543990), (4, 5271995), (5, 4217596), (10, 2108798), (20, 1054399), (383, 55060), (766, 27530), (1532, 13765), (1915, 11012), (2753, 7660), (3830, 5506)]