20989290

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{787}}^1$

素因数の和:931

約数の個数: 64

約数和(自身を含む): 58097664

約数和(自身を除く): 37108374

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 127, 210, 254, 381, 635, 762, 787, 889, 1270, 1574, 1778, 1905, 2361, 2667, 3810, 3935, 4445, 4722, 5334, 5509, 7870, 8890, 11018, 11805, 13335, 16527, 23610, 26670, 27545, 33054, 55090, 82635, 99949, 165270, 199898, 299847, 499745, 599694, 699643, 999490, 1399286, 1499235, 2098929, 2998470, 3498215, 4197858, 6996430, 10494645, 20989290]

約数ペア:

[(1, 20989290), (2, 10494645), (3, 6996430), (5, 4197858), (6, 3498215), (7, 2998470), (10, 2098929), (14, 1499235), (15, 1399286), (21, 999490), (30, 699643), (35, 599694), (42, 499745), (70, 299847), (105, 199898), (127, 165270), (210, 99949), (254, 82635), (381, 55090), (635, 33054), (762, 27545), (787, 26670), (889, 23610), (1270, 16527), (1574, 13335), (1778, 11805), (1905, 11018), (2361, 8890), (2667, 7870), (3810, 5509), (3935, 5334), (4445, 4722)]