281405900

素因数分解:

$2^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:471

約数の個数: 72

約数和(自身を含む): 624960000

約数和(自身を除く): 343554100

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 158, 179, 199, 316, 358, 395, 398, 716, 790, 796, 895, 995, 1580, 1790, 1975, 1990, 3580, 3950, 3980, 4475, 4975, 7900, 8950, 9950, 14141, 15721, 17900, 19900, 28282, 31442, 35621, 56564, 62884, 70705, 71242, 78605, 141410, 142484, 157210, 178105, 282820, 314420, 353525, 356210, 393025, 707050, 712420, 786050, 890525, 1414100, 1572100, 1781050, 2814059, 3562100, 5628118, 11256236, 14070295, 28140590, 56281180, 70351475, 140702950, 281405900]

約数ペア:

[(1, 281405900), (2, 140702950), (4, 70351475), (5, 56281180), (10, 28140590), (20, 14070295), (25, 11256236), (50, 5628118), (79, 3562100), (100, 2814059), (158, 1781050), (179, 1572100), (199, 1414100), (316, 890525), (358, 786050), (395, 712420), (398, 707050), (716, 393025), (790, 356210), (796, 353525), (895, 314420), (995, 282820), (1580, 178105), (1790, 157210), (1975, 142484), (1990, 141410), (3580, 78605), (3950, 71242), (3980, 70705), (4475, 62884), (4975, 56564), (7900, 35621), (8950, 31442), (9950, 28282), (14141, 19900), (15721, 17900)]