21986380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{821}}^1$

素因数の和:946

約数の個数: 48

約数和(自身を含む): 50266944

約数和(自身を除く): 28280564

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 103, 130, 206, 260, 412, 515, 821, 1030, 1339, 1642, 2060, 2678, 3284, 4105, 5356, 6695, 8210, 10673, 13390, 16420, 21346, 26780, 42692, 53365, 84563, 106730, 169126, 213460, 338252, 422815, 845630, 1099319, 1691260, 2198638, 4397276, 5496595, 10993190, 21986380]

約数ペア:

[(1, 21986380), (2, 10993190), (4, 5496595), (5, 4397276), (10, 2198638), (13, 1691260), (20, 1099319), (26, 845630), (52, 422815), (65, 338252), (103, 213460), (130, 169126), (206, 106730), (260, 84563), (412, 53365), (515, 42692), (821, 26780), (1030, 21346), (1339, 16420), (1642, 13390), (2060, 10673), (2678, 8210), (3284, 6695), (4105, 5356)]