20491850

素因数分解:

$2^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{173}}^1$

素因数の和:311

約数の個数: 48

約数和(自身を含む): 40390272

約数和(自身を除く): 19898422

約数列:

[1, 2, 5, 10, 23, 25, 46, 50, 103, 115, 173, 206, 230, 346, 515, 575, 865, 1030, 1150, 1730, 2369, 2575, 3979, 4325, 4738, 5150, 7958, 8650, 11845, 17819, 19895, 23690, 35638, 39790, 59225, 89095, 99475, 118450, 178190, 198950, 409837, 445475, 819674, 890950, 2049185, 4098370, 10245925, 20491850]

約数ペア:

[(1, 20491850), (2, 10245925), (5, 4098370), (10, 2049185), (23, 890950), (25, 819674), (46, 445475), (50, 409837), (103, 198950), (115, 178190), (173, 118450), (206, 99475), (230, 89095), (346, 59225), (515, 39790), (575, 35638), (865, 23690), (1030, 19895), (1150, 17819), (1730, 11845), (2369, 8650), (2575, 7958), (3979, 5150), (4325, 4738)]