18974007

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{487}}^1$

素因数の和:549

約数の個数: 40

約数和(自身を含む): 31413536

約数和(自身を除く): 12439529

約数列:

[1, 3, 9, 13, 27, 37, 39, 81, 111, 117, 333, 351, 481, 487, 999, 1053, 1443, 1461, 2997, 4329, 4383, 6331, 12987, 13149, 18019, 18993, 38961, 39447, 54057, 56979, 162171, 170937, 234247, 486513, 512811, 702741, 1459539, 2108223, 6324669, 18974007]

約数ペア:

[(1, 18974007), (3, 6324669), (9, 2108223), (13, 1459539), (27, 702741), (37, 512811), (39, 486513), (81, 234247), (111, 170937), (117, 162171), (333, 56979), (351, 54057), (481, 39447), (487, 38961), (999, 18993), (1053, 18019), (1443, 13149), (1461, 12987), (2997, 6331), (4329, 4383)]