19996075

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 29462400

約数和(自身を除く): 9466325

約数列:

[1, 5, 11, 19, 25, 43, 55, 89, 95, 209, 215, 275, 445, 473, 475, 817, 979, 1045, 1075, 1691, 2225, 2365, 3827, 4085, 4895, 5225, 8455, 8987, 11825, 18601, 19135, 20425, 24475, 42097, 42275, 44935, 72713, 93005, 95675, 210485, 224675, 363565, 465025, 799843, 1052425, 1817825, 3999215, 19996075]

約数ペア:

[(1, 19996075), (5, 3999215), (11, 1817825), (19, 1052425), (25, 799843), (43, 465025), (55, 363565), (89, 224675), (95, 210485), (209, 95675), (215, 93005), (275, 72713), (445, 44935), (473, 42275), (475, 42097), (817, 24475), (979, 20425), (1045, 19135), (1075, 18601), (1691, 11825), (2225, 8987), (2365, 8455), (3827, 5225), (4085, 4895)]