20643320

素因数分解:

$2^3\times 5^1\times {\mathrm{569}}^1\times {\mathrm{907}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 46580400

約数和(自身を除く): 25937080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 569, 907, 1138, 1814, 2276, 2845, 3628, 4535, 4552, 5690, 7256, 9070, 11380, 18140, 22760, 36280, 516083, 1032166, 2064332, 2580415, 4128664, 5160830, 10321660, 20643320]

約数ペア:

[(1, 20643320), (2, 10321660), (4, 5160830), (5, 4128664), (8, 2580415), (10, 2064332), (20, 1032166), (40, 516083), (569, 36280), (907, 22760), (1138, 18140), (1814, 11380), (2276, 9070), (2845, 7256), (3628, 5690), (4535, 4552)]