20861512

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 47139840

約数和(自身を除く): 26278328

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 61, 62, 122, 124, 197, 217, 244, 248, 394, 427, 434, 488, 788, 854, 868, 1379, 1576, 1708, 1736, 1891, 2758, 3416, 3782, 5516, 6107, 7564, 11032, 12017, 12214, 13237, 15128, 24034, 24428, 26474, 42749, 48068, 48856, 52948, 84119, 85498, 96136, 105896, 168238, 170996, 336476, 341992, 372527, 672952, 745054, 1490108, 2607689, 2980216, 5215378, 10430756, 20861512]

約数ペア:

[(1, 20861512), (2, 10430756), (4, 5215378), (7, 2980216), (8, 2607689), (14, 1490108), (28, 745054), (31, 672952), (56, 372527), (61, 341992), (62, 336476), (122, 170996), (124, 168238), (197, 105896), (217, 96136), (244, 85498), (248, 84119), (394, 52948), (427, 48856), (434, 48068), (488, 42749), (788, 26474), (854, 24428), (868, 24034), (1379, 15128), (1576, 13237), (1708, 12214), (1736, 12017), (1891, 11032), (2758, 7564), (3416, 6107), (3782, 5516)]