21106520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31039}}^1$

素因数の和:31067

約数の個数: 32

約数和(自身を含む): 50284800

約数和(自身を除く): 29178280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31039, 62078, 124156, 155195, 248312, 310390, 527663, 620780, 1055326, 1241560, 2110652, 2638315, 4221304, 5276630, 10553260, 21106520]

約数ペア:

[(1, 21106520), (2, 10553260), (4, 5276630), (5, 4221304), (8, 2638315), (10, 2110652), (17, 1241560), (20, 1055326), (34, 620780), (40, 527663), (68, 310390), (85, 248312), (136, 155195), (170, 124156), (340, 62078), (680, 31039)]