20122280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11699}}^1$

素因数の和:11753

約数の個数: 32

約数和(自身を含む): 46332000

約数和(自身を除く): 26209720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11699, 23398, 46796, 58495, 93592, 116990, 233980, 467960, 503057, 1006114, 2012228, 2515285, 4024456, 5030570, 10061140, 20122280]

約数ペア:

[(1, 20122280), (2, 10061140), (4, 5030570), (5, 4024456), (8, 2515285), (10, 2012228), (20, 1006114), (40, 503057), (43, 467960), (86, 233980), (172, 116990), (215, 93592), (344, 58495), (430, 46796), (860, 23398), (1720, 11699)]