19905704

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{739}}^1$

素因数の和:802

約数の個数: 64

約数和(自身を含む): 47241600

約数和(自身を除く): 27335896

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 37, 52, 56, 74, 91, 104, 148, 182, 259, 296, 364, 481, 518, 728, 739, 962, 1036, 1478, 1924, 2072, 2956, 3367, 3848, 5173, 5912, 6734, 9607, 10346, 13468, 19214, 20692, 26936, 27343, 38428, 41384, 54686, 67249, 76856, 109372, 134498, 191401, 218744, 268996, 355459, 382802, 537992, 710918, 765604, 1421836, 1531208, 2488213, 2843672, 4976426, 9952852, 19905704]

約数ペア:

[(1, 19905704), (2, 9952852), (4, 4976426), (7, 2843672), (8, 2488213), (13, 1531208), (14, 1421836), (26, 765604), (28, 710918), (37, 537992), (52, 382802), (56, 355459), (74, 268996), (91, 218744), (104, 191401), (148, 134498), (182, 109372), (259, 76856), (296, 67249), (364, 54686), (481, 41384), (518, 38428), (728, 27343), (739, 26936), (962, 20692), (1036, 19214), (1478, 13468), (1924, 10346), (2072, 9607), (2956, 6734), (3367, 5912), (3848, 5173)]