81311220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{4657}}^1$

素因数の和:4769

約数の個数: 72

約数和(自身を含む): 249240264

約数和(自身を除く): 167929044

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 97, 180, 194, 291, 388, 485, 582, 873, 970, 1164, 1455, 1746, 1940, 2910, 3492, 4365, 4657, 5820, 8730, 9314, 13971, 17460, 18628, 23285, 27942, 41913, 46570, 55884, 69855, 83826, 93140, 139710, 167652, 209565, 279420, 419130, 451729, 838260, 903458, 1355187, 1806916, 2258645, 2710374, 4065561, 4517290, 5420748, 6775935, 8131122, 9034580, 13551870, 16262244, 20327805, 27103740, 40655610, 81311220]

約数ペア:

[(1, 81311220), (2, 40655610), (3, 27103740), (4, 20327805), (5, 16262244), (6, 13551870), (9, 9034580), (10, 8131122), (12, 6775935), (15, 5420748), (18, 4517290), (20, 4065561), (30, 2710374), (36, 2258645), (45, 1806916), (60, 1355187), (90, 903458), (97, 838260), (180, 451729), (194, 419130), (291, 279420), (388, 209565), (485, 167652), (582, 139710), (873, 93140), (970, 83826), (1164, 69855), (1455, 55884), (1746, 46570), (1940, 41913), (2910, 27942), (3492, 23285), (4365, 18628), (4657, 17460), (5820, 13971), (8730, 9314)]