21077620

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1319}}^1$

素因数の和:1392

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 26822540

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 47, 68, 85, 94, 170, 188, 235, 340, 470, 799, 940, 1319, 1598, 2638, 3196, 3995, 5276, 6595, 7990, 13190, 15980, 22423, 26380, 44846, 61993, 89692, 112115, 123986, 224230, 247972, 309965, 448460, 619930, 1053881, 1239860, 2107762, 4215524, 5269405, 10538810, 21077620]

約数ペア:

[(1, 21077620), (2, 10538810), (4, 5269405), (5, 4215524), (10, 2107762), (17, 1239860), (20, 1053881), (34, 619930), (47, 448460), (68, 309965), (85, 247972), (94, 224230), (170, 123986), (188, 112115), (235, 89692), (340, 61993), (470, 44846), (799, 26380), (940, 22423), (1319, 15980), (1598, 13190), (2638, 7990), (3196, 6595), (3995, 5276)]