21190760

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7907}}^1$

素因数の和:7985

約数の個数: 32

約数和(自身を含む): 48396960

約数和(自身を除く): 27206200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7907, 15814, 31628, 39535, 63256, 79070, 158140, 316280, 529769, 1059538, 2119076, 2648845, 4238152, 5297690, 10595380, 21190760]

約数ペア:

[(1, 21190760), (2, 10595380), (4, 5297690), (5, 4238152), (8, 2648845), (10, 2119076), (20, 1059538), (40, 529769), (67, 316280), (134, 158140), (268, 79070), (335, 63256), (536, 39535), (670, 31628), (1340, 15814), (2680, 7907)]