20016500

素因数分解:

$2^2\times 5^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1$

素因数の和:95

約数の個数: 144

約数和(自身を含む): 54774720

約数和(自身を除く): 34758220

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 25, 28, 35, 38, 43, 49, 50, 70, 76, 86, 95, 98, 100, 125, 133, 140, 172, 175, 190, 196, 215, 245, 250, 266, 301, 350, 380, 430, 475, 490, 500, 532, 602, 665, 700, 817, 860, 875, 931, 950, 980, 1075, 1204, 1225, 1330, 1505, 1634, 1750, 1862, 1900, 2107, 2150, 2375, 2450, 2660, 3010, 3268, 3325, 3500, 3724, 4085, 4214, 4300, 4655, 4750, 4900, 5375, 5719, 6020, 6125, 6650, 7525, 8170, 8428, 9310, 9500, 10535, 10750, 11438, 12250, 13300, 15050, 16340, 16625, 18620, 20425, 21070, 21500, 22876, 23275, 24500, 28595, 30100, 33250, 37625, 40033, 40850, 42140, 46550, 52675, 57190, 66500, 75250, 80066, 81700, 93100, 102125, 105350, 114380, 116375, 142975, 150500, 160132, 200165, 204250, 210700, 232750, 263375, 285950, 400330, 408500, 465500, 526750, 571900, 714875, 800660, 1000825, 1053500, 1429750, 2001650, 2859500, 4003300, 5004125, 10008250, 20016500]

約数ペア:

[(1, 20016500), (2, 10008250), (4, 5004125), (5, 4003300), (7, 2859500), (10, 2001650), (14, 1429750), (19, 1053500), (20, 1000825), (25, 800660), (28, 714875), (35, 571900), (38, 526750), (43, 465500), (49, 408500), (50, 400330), (70, 285950), (76, 263375), (86, 232750), (95, 210700), (98, 204250), (100, 200165), (125, 160132), (133, 150500), (140, 142975), (172, 116375), (175, 114380), (190, 105350), (196, 102125), (215, 93100), (245, 81700), (250, 80066), (266, 75250), (301, 66500), (350, 57190), (380, 52675), (430, 46550), (475, 42140), (490, 40850), (500, 40033), (532, 37625), (602, 33250), (665, 30100), (700, 28595), (817, 24500), (860, 23275), (875, 22876), (931, 21500), (950, 21070), (980, 20425), (1075, 18620), (1204, 16625), (1225, 16340), (1330, 15050), (1505, 13300), (1634, 12250), (1750, 11438), (1862, 10750), (1900, 10535), (2107, 9500), (2150, 9310), (2375, 8428), (2450, 8170), (2660, 7525), (3010, 6650), (3268, 6125), (3325, 6020), (3500, 5719), (3724, 5375), (4085, 4900), (4214, 4750), (4300, 4655)]