19979260

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:108

約数の個数: 144

約数和(自身を含む): 54583200

約数和(自身を除く): 34603940

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 29, 35, 37, 38, 49, 58, 70, 74, 76, 95, 98, 116, 133, 140, 145, 148, 185, 190, 196, 203, 245, 259, 266, 290, 370, 380, 406, 490, 518, 532, 551, 580, 665, 703, 740, 812, 931, 980, 1015, 1036, 1073, 1102, 1295, 1330, 1406, 1421, 1813, 1862, 2030, 2146, 2204, 2590, 2660, 2755, 2812, 2842, 3515, 3626, 3724, 3857, 4060, 4292, 4655, 4921, 5180, 5365, 5510, 5684, 7030, 7105, 7252, 7511, 7714, 9065, 9310, 9842, 10730, 11020, 14060, 14210, 15022, 15428, 18130, 18620, 19285, 19684, 20387, 21460, 24605, 26999, 28420, 30044, 34447, 36260, 37555, 38570, 40774, 49210, 52577, 53998, 68894, 75110, 77140, 81548, 98420, 101935, 105154, 107996, 134995, 137788, 142709, 150220, 172235, 203870, 210308, 262885, 269990, 285418, 344470, 407740, 525770, 539980, 570836, 688940, 713545, 998963, 1051540, 1427090, 1997926, 2854180, 3995852, 4994815, 9989630, 19979260]

約数ペア:

[(1, 19979260), (2, 9989630), (4, 4994815), (5, 3995852), (7, 2854180), (10, 1997926), (14, 1427090), (19, 1051540), (20, 998963), (28, 713545), (29, 688940), (35, 570836), (37, 539980), (38, 525770), (49, 407740), (58, 344470), (70, 285418), (74, 269990), (76, 262885), (95, 210308), (98, 203870), (116, 172235), (133, 150220), (140, 142709), (145, 137788), (148, 134995), (185, 107996), (190, 105154), (196, 101935), (203, 98420), (245, 81548), (259, 77140), (266, 75110), (290, 68894), (370, 53998), (380, 52577), (406, 49210), (490, 40774), (518, 38570), (532, 37555), (551, 36260), (580, 34447), (665, 30044), (703, 28420), (740, 26999), (812, 24605), (931, 21460), (980, 20387), (1015, 19684), (1036, 19285), (1073, 18620), (1102, 18130), (1295, 15428), (1330, 15022), (1406, 14210), (1421, 14060), (1813, 11020), (1862, 10730), (2030, 9842), (2146, 9310), (2204, 9065), (2590, 7714), (2660, 7511), (2755, 7252), (2812, 7105), (2842, 7030), (3515, 5684), (3626, 5510), (3724, 5365), (3857, 5180), (4060, 4921), (4292, 4655)]