20450556

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:221

約数の個数: 120

約数和(自身を含む): 62447616

約数和(自身を除く): 41997060

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 71, 81, 84, 108, 126, 127, 142, 162, 189, 213, 252, 254, 284, 324, 378, 381, 426, 497, 508, 567, 639, 756, 762, 852, 889, 994, 1134, 1143, 1278, 1491, 1524, 1778, 1917, 1988, 2268, 2286, 2556, 2667, 2982, 3429, 3556, 3834, 4473, 4572, 5334, 5751, 5964, 6858, 7668, 8001, 8946, 9017, 10287, 10668, 11502, 13419, 13716, 16002, 17892, 18034, 20574, 23004, 24003, 26838, 27051, 32004, 36068, 40257, 41148, 48006, 53676, 54102, 63119, 72009, 80514, 81153, 96012, 108204, 126238, 144018, 161028, 162306, 189357, 243459, 252476, 288036, 324612, 378714, 486918, 568071, 730377, 757428, 973836, 1136142, 1460754, 1704213, 2272284, 2921508, 3408426, 5112639, 6816852, 10225278, 20450556]

約数ペア:

[(1, 20450556), (2, 10225278), (3, 6816852), (4, 5112639), (6, 3408426), (7, 2921508), (9, 2272284), (12, 1704213), (14, 1460754), (18, 1136142), (21, 973836), (27, 757428), (28, 730377), (36, 568071), (42, 486918), (54, 378714), (63, 324612), (71, 288036), (81, 252476), (84, 243459), (108, 189357), (126, 162306), (127, 161028), (142, 144018), (162, 126238), (189, 108204), (213, 96012), (252, 81153), (254, 80514), (284, 72009), (324, 63119), (378, 54102), (381, 53676), (426, 48006), (497, 41148), (508, 40257), (567, 36068), (639, 32004), (756, 27051), (762, 26838), (852, 24003), (889, 23004), (994, 20574), (1134, 18034), (1143, 17892), (1278, 16002), (1491, 13716), (1524, 13419), (1778, 11502), (1917, 10668), (1988, 10287), (2268, 9017), (2286, 8946), (2556, 8001), (2667, 7668), (2982, 6858), (3429, 5964), (3556, 5751), (3834, 5334), (4473, 4572)]