21756080

素因数分解:

$2^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{1801}}^1$

素因数の和:1965

約数の個数: 40

約数和(自身を含む): 50946144

約数和(自身を除く): 29190064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 151, 302, 604, 755, 1208, 1510, 1801, 2416, 3020, 3602, 6040, 7204, 9005, 12080, 14408, 18010, 28816, 36020, 72040, 144080, 271951, 543902, 1087804, 1359755, 2175608, 2719510, 4351216, 5439020, 10878040, 21756080]

約数ペア:

[(1, 21756080), (2, 10878040), (4, 5439020), (5, 4351216), (8, 2719510), (10, 2175608), (16, 1359755), (20, 1087804), (40, 543902), (80, 271951), (151, 144080), (302, 72040), (604, 36020), (755, 28816), (1208, 18010), (1510, 14408), (1801, 12080), (2416, 9005), (3020, 7204), (3602, 6040)]