19897540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{743}}^1$

素因数の和:868

約数の個数: 48

約数和(自身を含む): 45497088

約数和(自身を除く): 25599548

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 103, 130, 206, 260, 412, 515, 743, 1030, 1339, 1486, 2060, 2678, 2972, 3715, 5356, 6695, 7430, 9659, 13390, 14860, 19318, 26780, 38636, 48295, 76529, 96590, 153058, 193180, 306116, 382645, 765290, 994877, 1530580, 1989754, 3979508, 4974385, 9948770, 19897540]

約数ペア:

[(1, 19897540), (2, 9948770), (4, 4974385), (5, 3979508), (10, 1989754), (13, 1530580), (20, 994877), (26, 765290), (52, 382645), (65, 306116), (103, 193180), (130, 153058), (206, 96590), (260, 76529), (412, 48295), (515, 38636), (743, 26780), (1030, 19318), (1339, 14860), (1486, 13390), (2060, 9659), (2678, 7430), (2972, 6695), (3715, 5356)]