21007305

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^2$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 42142464

約数和(自身を除く): 21135159

約数列:

[1, 3, 5, 9, 11, 15, 31, 33, 37, 45, 55, 93, 99, 111, 155, 165, 185, 279, 333, 341, 407, 465, 495, 555, 1023, 1147, 1221, 1369, 1395, 1665, 1705, 2035, 3069, 3441, 3663, 4107, 5115, 5735, 6105, 6845, 10323, 12321, 12617, 15059, 15345, 17205, 18315, 20535, 37851, 42439, 45177, 51615, 61605, 63085, 75295, 113553, 127317, 135531, 189255, 212195, 225885, 381951, 466829, 567765, 636585, 677655, 1400487, 1909755, 2334145, 4201461, 7002435, 21007305]

約数ペア:

[(1, 21007305), (3, 7002435), (5, 4201461), (9, 2334145), (11, 1909755), (15, 1400487), (31, 677655), (33, 636585), (37, 567765), (45, 466829), (55, 381951), (93, 225885), (99, 212195), (111, 189255), (155, 135531), (165, 127317), (185, 113553), (279, 75295), (333, 63085), (341, 61605), (407, 51615), (465, 45177), (495, 42439), (555, 37851), (1023, 20535), (1147, 18315), (1221, 17205), (1369, 15345), (1395, 15059), (1665, 12617), (1705, 12321), (2035, 10323), (3069, 6845), (3441, 6105), (3663, 5735), (4107, 5115)]