1990342221

素因数分解:

$3^1\times 7^3\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{857}}^1$

素因数の和:979

約数の個数: 64

約数和(自身を含む): 3234316800

約数和(自身を除く): 1243974579

約数列:

[1, 3, 7, 21, 37, 49, 61, 111, 147, 183, 259, 343, 427, 777, 857, 1029, 1281, 1813, 2257, 2571, 2989, 5439, 5999, 6771, 8967, 12691, 15799, 17997, 20923, 31709, 38073, 41993, 47397, 52277, 62769, 95127, 110593, 125979, 156831, 221963, 293951, 331779, 365939, 665889, 774151, 881853, 1097817, 1553741, 1934249, 2322453, 2561573, 4661223, 5802747, 7684719, 10876187, 13539743, 17931011, 32628561, 40619229, 53793033, 94778201, 284334603, 663447407, 1990342221]

約数ペア:

[(1, 1990342221), (3, 663447407), (7, 284334603), (21, 94778201), (37, 53793033), (49, 40619229), (61, 32628561), (111, 17931011), (147, 13539743), (183, 10876187), (259, 7684719), (343, 5802747), (427, 4661223), (777, 2561573), (857, 2322453), (1029, 1934249), (1281, 1553741), (1813, 1097817), (2257, 881853), (2571, 774151), (2989, 665889), (5439, 365939), (5999, 331779), (6771, 293951), (8967, 221963), (12691, 156831), (15799, 125979), (17997, 110593), (20923, 95127), (31709, 62769), (38073, 52277), (41993, 47397)]