19816720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3217}}^1$

素因数の和:3248

約数の個数: 80

約数和(自身を含む): 57460608

約数和(自身を除く): 37643888

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 176, 220, 280, 308, 385, 440, 560, 616, 770, 880, 1232, 1540, 3080, 3217, 6160, 6434, 12868, 16085, 22519, 25736, 32170, 35387, 45038, 51472, 64340, 70774, 90076, 112595, 128680, 141548, 176935, 180152, 225190, 247709, 257360, 283096, 353870, 360304, 450380, 495418, 566192, 707740, 900760, 990836, 1238545, 1415480, 1801520, 1981672, 2477090, 2830960, 3963344, 4954180, 9908360, 19816720]

約数ペア:

[(1, 19816720), (2, 9908360), (4, 4954180), (5, 3963344), (7, 2830960), (8, 2477090), (10, 1981672), (11, 1801520), (14, 1415480), (16, 1238545), (20, 990836), (22, 900760), (28, 707740), (35, 566192), (40, 495418), (44, 450380), (55, 360304), (56, 353870), (70, 283096), (77, 257360), (80, 247709), (88, 225190), (110, 180152), (112, 176935), (140, 141548), (154, 128680), (176, 112595), (220, 90076), (280, 70774), (308, 64340), (385, 51472), (440, 45038), (560, 35387), (616, 32170), (770, 25736), (880, 22519), (1232, 16085), (1540, 12868), (3080, 6434), (3217, 6160)]