19805000

素因数分解:

$2^3\times 5^4\times {\mathrm{17}}^1\times {\mathrm{233}}^1$

素因数の和:276

約数の個数: 80

約数和(自身を含む): 49343580

約数和(自身を除く): 29538580

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 25, 34, 40, 50, 68, 85, 100, 125, 136, 170, 200, 233, 250, 340, 425, 466, 500, 625, 680, 850, 932, 1000, 1165, 1250, 1700, 1864, 2125, 2330, 2500, 3400, 3961, 4250, 4660, 5000, 5825, 7922, 8500, 9320, 10625, 11650, 15844, 17000, 19805, 21250, 23300, 29125, 31688, 39610, 42500, 46600, 58250, 79220, 85000, 99025, 116500, 145625, 158440, 198050, 233000, 291250, 396100, 495125, 582500, 792200, 990250, 1165000, 1980500, 2475625, 3961000, 4951250, 9902500, 19805000]

約数ペア:

[(1, 19805000), (2, 9902500), (4, 4951250), (5, 3961000), (8, 2475625), (10, 1980500), (17, 1165000), (20, 990250), (25, 792200), (34, 582500), (40, 495125), (50, 396100), (68, 291250), (85, 233000), (100, 198050), (125, 158440), (136, 145625), (170, 116500), (200, 99025), (233, 85000), (250, 79220), (340, 58250), (425, 46600), (466, 42500), (500, 39610), (625, 31688), (680, 29125), (850, 23300), (932, 21250), (1000, 19805), (1165, 17000), (1250, 15844), (1700, 11650), (1864, 10625), (2125, 9320), (2330, 8500), (2500, 7922), (3400, 5825), (3961, 5000), (4250, 4660)]