20320355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{211}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 28574208

約数和(自身を除く): 8253853

約数列:

[1, 5, 11, 17, 55, 85, 103, 187, 211, 515, 935, 1055, 1133, 1751, 2321, 3587, 5665, 8755, 11605, 17935, 19261, 21733, 39457, 96305, 108665, 197285, 239063, 369461, 1195315, 1847305, 4064071, 20320355]

約数ペア:

[(1, 20320355), (5, 4064071), (11, 1847305), (17, 1195315), (55, 369461), (85, 239063), (103, 197285), (187, 108665), (211, 96305), (515, 39457), (935, 21733), (1055, 19261), (1133, 17935), (1751, 11605), (2321, 8755), (3587, 5665)]