21789160

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6563}}^1$

素因数の和:6657

約数の個数: 32

約数和(自身を含む): 49623840

約数和(自身を除く): 27834680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6563, 13126, 26252, 32815, 52504, 65630, 131260, 262520, 544729, 1089458, 2178916, 2723645, 4357832, 5447290, 10894580, 21789160]

約数ペア:

[(1, 21789160), (2, 10894580), (4, 5447290), (5, 4357832), (8, 2723645), (10, 2178916), (20, 1089458), (40, 544729), (83, 262520), (166, 131260), (332, 65630), (415, 52504), (664, 32815), (830, 26252), (1660, 13126), (3320, 6563)]