21696760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31907}}^1$

素因数の和:31935

約数の個数: 32

約数和(自身を含む): 51690960

約数和(自身を除く): 29994200

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31907, 63814, 127628, 159535, 255256, 319070, 542419, 638140, 1084838, 1276280, 2169676, 2712095, 4339352, 5424190, 10848380, 21696760]

約数ペア:

[(1, 21696760), (2, 10848380), (4, 5424190), (5, 4339352), (8, 2712095), (10, 2169676), (17, 1276280), (20, 1084838), (34, 638140), (40, 542419), (68, 319070), (85, 255256), (136, 159535), (170, 127628), (340, 63814), (680, 31907)]