20980500

素因数分解:

$2^2\times 3^1\times 5^3\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:290

約数の個数: 96

約数和(自身を含む): 62270208

約数和(自身を除く): 41289708

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 71, 75, 100, 125, 142, 150, 197, 213, 250, 284, 300, 355, 375, 394, 426, 500, 591, 710, 750, 788, 852, 985, 1065, 1182, 1420, 1500, 1775, 1970, 2130, 2364, 2955, 3550, 3940, 4260, 4925, 5325, 5910, 7100, 8875, 9850, 10650, 11820, 13987, 14775, 17750, 19700, 21300, 24625, 26625, 27974, 29550, 35500, 41961, 49250, 53250, 55948, 59100, 69935, 73875, 83922, 98500, 106500, 139870, 147750, 167844, 209805, 279740, 295500, 349675, 419610, 699350, 839220, 1049025, 1398700, 1748375, 2098050, 3496750, 4196100, 5245125, 6993500, 10490250, 20980500]

約数ペア:

[(1, 20980500), (2, 10490250), (3, 6993500), (4, 5245125), (5, 4196100), (6, 3496750), (10, 2098050), (12, 1748375), (15, 1398700), (20, 1049025), (25, 839220), (30, 699350), (50, 419610), (60, 349675), (71, 295500), (75, 279740), (100, 209805), (125, 167844), (142, 147750), (150, 139870), (197, 106500), (213, 98500), (250, 83922), (284, 73875), (300, 69935), (355, 59100), (375, 55948), (394, 53250), (426, 49250), (500, 41961), (591, 35500), (710, 29550), (750, 27974), (788, 26625), (852, 24625), (985, 21300), (1065, 19700), (1182, 17750), (1420, 14775), (1500, 13987), (1775, 11820), (1970, 10650), (2130, 9850), (2364, 8875), (2955, 7100), (3550, 5910), (3940, 5325), (4260, 4925)]