21787160

素因数分解:

$2^3\times 5^1\times {\mathrm{353}}^1\times {\mathrm{1543}}^1$

素因数の和:1907

約数の個数: 32

約数和(自身を含む): 49191840

約数和(自身を除く): 27404680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 353, 706, 1412, 1543, 1765, 2824, 3086, 3530, 6172, 7060, 7715, 12344, 14120, 15430, 30860, 61720, 544679, 1089358, 2178716, 2723395, 4357432, 5446790, 10893580, 21787160]

約数ペア:

[(1, 21787160), (2, 10893580), (4, 5446790), (5, 4357432), (8, 2723395), (10, 2178716), (20, 1089358), (40, 544679), (353, 61720), (706, 30860), (1412, 15430), (1543, 14120), (1765, 12344), (2824, 7715), (3086, 7060), (3530, 6172)]