19995500

素因数分解:

$2^2\times 5^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:252

約数の個数: 96

約数和(自身を含む): 51891840

約数和(自身を除く): 31896340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 29, 35, 50, 58, 70, 100, 116, 125, 140, 145, 175, 197, 203, 250, 290, 350, 394, 406, 500, 580, 700, 725, 788, 812, 875, 985, 1015, 1379, 1450, 1750, 1970, 2030, 2758, 2900, 3500, 3625, 3940, 4060, 4925, 5075, 5516, 5713, 6895, 7250, 9850, 10150, 11426, 13790, 14500, 19700, 20300, 22852, 24625, 25375, 27580, 28565, 34475, 39991, 49250, 50750, 57130, 68950, 79982, 98500, 101500, 114260, 137900, 142825, 159964, 172375, 199955, 285650, 344750, 399910, 571300, 689500, 714125, 799820, 999775, 1428250, 1999550, 2856500, 3999100, 4998875, 9997750, 19995500]

約数ペア:

[(1, 19995500), (2, 9997750), (4, 4998875), (5, 3999100), (7, 2856500), (10, 1999550), (14, 1428250), (20, 999775), (25, 799820), (28, 714125), (29, 689500), (35, 571300), (50, 399910), (58, 344750), (70, 285650), (100, 199955), (116, 172375), (125, 159964), (140, 142825), (145, 137900), (175, 114260), (197, 101500), (203, 98500), (250, 79982), (290, 68950), (350, 57130), (394, 50750), (406, 49250), (500, 39991), (580, 34475), (700, 28565), (725, 27580), (788, 25375), (812, 24625), (875, 22852), (985, 20300), (1015, 19700), (1379, 14500), (1450, 13790), (1750, 11426), (1970, 10150), (2030, 9850), (2758, 7250), (2900, 6895), (3500, 5713), (3625, 5516), (3940, 5075), (4060, 4925)]