20664080

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6007}}^1$

素因数の和:6063

約数の個数: 40

約数和(自身を含む): 49169472

約数和(自身を除く): 28505392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6007, 12014, 24028, 30035, 48056, 60070, 96112, 120140, 240280, 258301, 480560, 516602, 1033204, 1291505, 2066408, 2583010, 4132816, 5166020, 10332040, 20664080]

約数ペア:

[(1, 20664080), (2, 10332040), (4, 5166020), (5, 4132816), (8, 2583010), (10, 2066408), (16, 1291505), (20, 1033204), (40, 516602), (43, 480560), (80, 258301), (86, 240280), (172, 120140), (215, 96112), (344, 60070), (430, 48056), (688, 30035), (860, 24028), (1720, 12014), (3440, 6007)]