640149800

素因数分解:

$2^3\times 5^2\times {\mathrm{23}}^1\times {\mathrm{317}}^1\times {\mathrm{439}}^1$

素因数の和:795

約数の個数: 96

約数和(自身を含む): 1561507200

約数和(自身を除く): 921357400

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 25, 40, 46, 50, 92, 100, 115, 184, 200, 230, 317, 439, 460, 575, 634, 878, 920, 1150, 1268, 1585, 1756, 2195, 2300, 2536, 3170, 3512, 4390, 4600, 6340, 7291, 7925, 8780, 10097, 10975, 12680, 14582, 15850, 17560, 20194, 21950, 29164, 31700, 36455, 40388, 43900, 50485, 58328, 63400, 72910, 80776, 87800, 100970, 139163, 145820, 182275, 201940, 252425, 278326, 291640, 364550, 403880, 504850, 556652, 695815, 729100, 1009700, 1113304, 1391630, 1458200, 2019400, 2783260, 3200749, 3479075, 5566520, 6401498, 6958150, 12802996, 13916300, 16003745, 25605992, 27832600, 32007490, 64014980, 80018725, 128029960, 160037450, 320074900, 640149800]

約数ペア:

[(1, 640149800), (2, 320074900), (4, 160037450), (5, 128029960), (8, 80018725), (10, 64014980), (20, 32007490), (23, 27832600), (25, 25605992), (40, 16003745), (46, 13916300), (50, 12802996), (92, 6958150), (100, 6401498), (115, 5566520), (184, 3479075), (200, 3200749), (230, 2783260), (317, 2019400), (439, 1458200), (460, 1391630), (575, 1113304), (634, 1009700), (878, 729100), (920, 695815), (1150, 556652), (1268, 504850), (1585, 403880), (1756, 364550), (2195, 291640), (2300, 278326), (2536, 252425), (3170, 201940), (3512, 182275), (4390, 145820), (4600, 139163), (6340, 100970), (7291, 87800), (7925, 80776), (8780, 72910), (10097, 63400), (10975, 58328), (12680, 50485), (14582, 43900), (15850, 40388), (17560, 36455), (20194, 31700), (21950, 29164)]