19805800

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:120

約数の個数: 144

約数和(自身を含む): 55978560

約数和(自身を除く): 36172760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 43, 47, 49, 50, 56, 70, 86, 94, 98, 100, 140, 172, 175, 188, 196, 200, 215, 235, 245, 280, 301, 329, 344, 350, 376, 392, 430, 470, 490, 602, 658, 700, 860, 940, 980, 1075, 1175, 1204, 1225, 1316, 1400, 1505, 1645, 1720, 1880, 1960, 2021, 2107, 2150, 2303, 2350, 2408, 2450, 2632, 3010, 3290, 4042, 4214, 4300, 4606, 4700, 4900, 6020, 6580, 7525, 8084, 8225, 8428, 8600, 9212, 9400, 9800, 10105, 10535, 11515, 12040, 13160, 14147, 15050, 16168, 16450, 16856, 18424, 20210, 21070, 23030, 28294, 30100, 32900, 40420, 42140, 46060, 50525, 52675, 56588, 57575, 60200, 65800, 70735, 80840, 84280, 92120, 99029, 101050, 105350, 113176, 115150, 141470, 198058, 202100, 210700, 230300, 282940, 353675, 396116, 404200, 421400, 460600, 495145, 565880, 707350, 792232, 990290, 1414700, 1980580, 2475725, 2829400, 3961160, 4951450, 9902900, 19805800]

約数ペア:

[(1, 19805800), (2, 9902900), (4, 4951450), (5, 3961160), (7, 2829400), (8, 2475725), (10, 1980580), (14, 1414700), (20, 990290), (25, 792232), (28, 707350), (35, 565880), (40, 495145), (43, 460600), (47, 421400), (49, 404200), (50, 396116), (56, 353675), (70, 282940), (86, 230300), (94, 210700), (98, 202100), (100, 198058), (140, 141470), (172, 115150), (175, 113176), (188, 105350), (196, 101050), (200, 99029), (215, 92120), (235, 84280), (245, 80840), (280, 70735), (301, 65800), (329, 60200), (344, 57575), (350, 56588), (376, 52675), (392, 50525), (430, 46060), (470, 42140), (490, 40420), (602, 32900), (658, 30100), (700, 28294), (860, 23030), (940, 21070), (980, 20210), (1075, 18424), (1175, 16856), (1204, 16450), (1225, 16168), (1316, 15050), (1400, 14147), (1505, 13160), (1645, 12040), (1720, 11515), (1880, 10535), (1960, 10105), (2021, 9800), (2107, 9400), (2150, 9212), (2303, 8600), (2350, 8428), (2408, 8225), (2450, 8084), (2632, 7525), (3010, 6580), (3290, 6020), (4042, 4900), (4214, 4700), (4300, 4606)]