19917200

素因数分解:

$2^4\times 5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:165

約数の個数: 120

約数和(自身を含む): 52931880

約数和(自身を除く): 33014680

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 29, 34, 40, 50, 58, 68, 80, 85, 100, 101, 116, 136, 145, 170, 200, 202, 232, 272, 290, 340, 400, 404, 425, 464, 493, 505, 580, 680, 725, 808, 850, 986, 1010, 1160, 1360, 1450, 1616, 1700, 1717, 1972, 2020, 2320, 2465, 2525, 2900, 2929, 3400, 3434, 3944, 4040, 4930, 5050, 5800, 5858, 6800, 6868, 7888, 8080, 8585, 9860, 10100, 11600, 11716, 12325, 13736, 14645, 17170, 19720, 20200, 23432, 24650, 27472, 29290, 34340, 39440, 40400, 42925, 46864, 49300, 49793, 58580, 68680, 73225, 85850, 98600, 99586, 117160, 137360, 146450, 171700, 197200, 199172, 234320, 248965, 292900, 343400, 398344, 497930, 585800, 686800, 796688, 995860, 1171600, 1244825, 1991720, 2489650, 3983440, 4979300, 9958600, 19917200]

約数ペア:

[(1, 19917200), (2, 9958600), (4, 4979300), (5, 3983440), (8, 2489650), (10, 1991720), (16, 1244825), (17, 1171600), (20, 995860), (25, 796688), (29, 686800), (34, 585800), (40, 497930), (50, 398344), (58, 343400), (68, 292900), (80, 248965), (85, 234320), (100, 199172), (101, 197200), (116, 171700), (136, 146450), (145, 137360), (170, 117160), (200, 99586), (202, 98600), (232, 85850), (272, 73225), (290, 68680), (340, 58580), (400, 49793), (404, 49300), (425, 46864), (464, 42925), (493, 40400), (505, 39440), (580, 34340), (680, 29290), (725, 27472), (808, 24650), (850, 23432), (986, 20200), (1010, 19720), (1160, 17170), (1360, 14645), (1450, 13736), (1616, 12325), (1700, 11716), (1717, 11600), (1972, 10100), (2020, 9860), (2320, 8585), (2465, 8080), (2525, 7888), (2900, 6868), (2929, 6800), (3400, 5858), (3434, 5800), (3944, 5050), (4040, 4930)]