20990750

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{449}}^1$

素因数の和:494

約数の個数: 64

約数和(自身を含む): 45489600

約数和(自身を除く): 24498850

約数列:

[1, 2, 5, 10, 11, 17, 22, 25, 34, 50, 55, 85, 110, 125, 170, 187, 250, 275, 374, 425, 449, 550, 850, 898, 935, 1375, 1870, 2125, 2245, 2750, 4250, 4490, 4675, 4939, 7633, 9350, 9878, 11225, 15266, 22450, 23375, 24695, 38165, 46750, 49390, 56125, 76330, 83963, 112250, 123475, 167926, 190825, 246950, 381650, 419815, 617375, 839630, 954125, 1234750, 1908250, 2099075, 4198150, 10495375, 20990750]

約数ペア:

[(1, 20990750), (2, 10495375), (5, 4198150), (10, 2099075), (11, 1908250), (17, 1234750), (22, 954125), (25, 839630), (34, 617375), (50, 419815), (55, 381650), (85, 246950), (110, 190825), (125, 167926), (170, 123475), (187, 112250), (250, 83963), (275, 76330), (374, 56125), (425, 49390), (449, 46750), (550, 38165), (850, 24695), (898, 23375), (935, 22450), (1375, 15266), (1870, 11225), (2125, 9878), (2245, 9350), (2750, 7633), (4250, 4939), (4490, 4675)]