20399665

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{277}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 29143296

約数和(自身を除く): 8743631

約数列:

[1, 5, 11, 13, 55, 65, 103, 143, 277, 515, 715, 1133, 1339, 1385, 3047, 3601, 5665, 6695, 14729, 15235, 18005, 28531, 39611, 73645, 142655, 198055, 313841, 370903, 1569205, 1854515, 4079933, 20399665]

約数ペア:

[(1, 20399665), (5, 4079933), (11, 1854515), (13, 1569205), (55, 370903), (65, 313841), (103, 198055), (143, 142655), (277, 73645), (515, 39611), (715, 28531), (1133, 18005), (1339, 15235), (1385, 14729), (3047, 6695), (3601, 5665)]