20625165

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1$

素因数の和:104

約数の個数: 128

約数和(自身を含む): 45619200

約数和(自身を除く): 24994035

約数列:

[1, 3, 5, 9, 11, 15, 17, 19, 27, 33, 43, 45, 51, 55, 57, 85, 95, 99, 129, 135, 153, 165, 171, 187, 209, 215, 255, 285, 297, 323, 387, 459, 473, 495, 513, 561, 627, 645, 731, 765, 817, 855, 935, 969, 1045, 1161, 1419, 1485, 1615, 1683, 1881, 1935, 2193, 2295, 2365, 2451, 2565, 2805, 2907, 3135, 3553, 3655, 4085, 4257, 4845, 5049, 5643, 5805, 6579, 7095, 7353, 8041, 8415, 8721, 8987, 9405, 10659, 10965, 12255, 12771, 13889, 14535, 17765, 19737, 21285, 22059, 24123, 25245, 26961, 28215, 31977, 32895, 36765, 40205, 41667, 43605, 44935, 53295, 63855, 69445, 72369, 80883, 95931, 98685, 110295, 120615, 125001, 134805, 152779, 159885, 208335, 217107, 242649, 361845, 375003, 404415, 458337, 479655, 625005, 763895, 1085535, 1213245, 1375011, 1875015, 2291685, 4125033, 6875055, 20625165]

約数ペア:

[(1, 20625165), (3, 6875055), (5, 4125033), (9, 2291685), (11, 1875015), (15, 1375011), (17, 1213245), (19, 1085535), (27, 763895), (33, 625005), (43, 479655), (45, 458337), (51, 404415), (55, 375003), (57, 361845), (85, 242649), (95, 217107), (99, 208335), (129, 159885), (135, 152779), (153, 134805), (165, 125001), (171, 120615), (187, 110295), (209, 98685), (215, 95931), (255, 80883), (285, 72369), (297, 69445), (323, 63855), (387, 53295), (459, 44935), (473, 43605), (495, 41667), (513, 40205), (561, 36765), (627, 32895), (645, 31977), (731, 28215), (765, 26961), (817, 25245), (855, 24123), (935, 22059), (969, 21285), (1045, 19737), (1161, 17765), (1419, 14535), (1485, 13889), (1615, 12771), (1683, 12255), (1881, 10965), (1935, 10659), (2193, 9405), (2295, 8987), (2365, 8721), (2451, 8415), (2565, 8041), (2805, 7353), (2907, 7095), (3135, 6579), (3553, 5805), (3655, 5643), (4085, 5049), (4257, 4845)]