20809503

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1$

素因数の和:109

約数の個数: 96

約数和(自身を含む): 39836160

約数和(自身を除く): 19026657

約数列:

[1, 3, 9, 11, 13, 19, 23, 33, 37, 39, 57, 69, 99, 111, 117, 143, 171, 207, 209, 247, 253, 299, 333, 407, 429, 437, 481, 627, 703, 741, 759, 851, 897, 1221, 1287, 1311, 1443, 1881, 2109, 2223, 2277, 2553, 2691, 2717, 3289, 3663, 3933, 4329, 4807, 5291, 5681, 6327, 7659, 7733, 8151, 9139, 9361, 9867, 11063, 14421, 15873, 16169, 17043, 23199, 24453, 27417, 28083, 29601, 33189, 43263, 47619, 48507, 51129, 62491, 69597, 82251, 84249, 99567, 100529, 121693, 145521, 177859, 187473, 210197, 301587, 365079, 533577, 562419, 630591, 904761, 1095237, 1600731, 1891773, 2312167, 6936501, 20809503]

約数ペア:

[(1, 20809503), (3, 6936501), (9, 2312167), (11, 1891773), (13, 1600731), (19, 1095237), (23, 904761), (33, 630591), (37, 562419), (39, 533577), (57, 365079), (69, 301587), (99, 210197), (111, 187473), (117, 177859), (143, 145521), (171, 121693), (207, 100529), (209, 99567), (247, 84249), (253, 82251), (299, 69597), (333, 62491), (407, 51129), (429, 48507), (437, 47619), (481, 43263), (627, 33189), (703, 29601), (741, 28083), (759, 27417), (851, 24453), (897, 23199), (1221, 17043), (1287, 16169), (1311, 15873), (1443, 14421), (1881, 11063), (2109, 9867), (2223, 9361), (2277, 9139), (2553, 8151), (2691, 7733), (2717, 7659), (3289, 6327), (3663, 5681), (3933, 5291), (4329, 4807)]