21793475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 32081280

約数和(自身を除く): 10287805

約数列:

[1, 5, 11, 19, 25, 43, 55, 95, 97, 209, 215, 275, 473, 475, 485, 817, 1045, 1067, 1075, 1843, 2365, 2425, 4085, 4171, 5225, 5335, 8987, 9215, 11825, 20273, 20425, 20855, 26675, 44935, 45881, 46075, 79249, 101365, 104275, 224675, 229405, 396245, 506825, 871739, 1147025, 1981225, 4358695, 21793475]

約数ペア:

[(1, 21793475), (5, 4358695), (11, 1981225), (19, 1147025), (25, 871739), (43, 506825), (55, 396245), (95, 229405), (97, 224675), (209, 104275), (215, 101365), (275, 79249), (473, 46075), (475, 45881), (485, 44935), (817, 26675), (1045, 20855), (1067, 20425), (1075, 20273), (1843, 11825), (2365, 9215), (2425, 8987), (4085, 5335), (4171, 5225)]