638694

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:189

約数の個数: 48

約数和(自身を含む): 1636128

約数和(自身を除く): 997434

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 37, 42, 63, 74, 111, 126, 137, 222, 259, 274, 333, 411, 518, 666, 777, 822, 959, 1233, 1554, 1918, 2331, 2466, 2877, 4662, 5069, 5754, 8631, 10138, 15207, 17262, 30414, 35483, 45621, 70966, 91242, 106449, 212898, 319347, 638694]

約数ペア:

[(1, 638694), (2, 319347), (3, 212898), (6, 106449), (7, 91242), (9, 70966), (14, 45621), (18, 35483), (21, 30414), (37, 17262), (42, 15207), (63, 10138), (74, 8631), (111, 5754), (126, 5069), (137, 4662), (222, 2877), (259, 2466), (274, 2331), (333, 1918), (411, 1554), (518, 1233), (666, 959), (777, 822)]