261455920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{17477}}^1$

素因数の和:17518

約数の個数: 80

約数和(自身を含む): 702196128

約数和(自身を除く): 440740208

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 34, 40, 44, 55, 68, 80, 85, 88, 110, 136, 170, 176, 187, 220, 272, 340, 374, 440, 680, 748, 880, 935, 1360, 1496, 1870, 2992, 3740, 7480, 14960, 17477, 34954, 69908, 87385, 139816, 174770, 192247, 279632, 297109, 349540, 384494, 594218, 699080, 768988, 961235, 1188436, 1398160, 1485545, 1537976, 1922470, 2376872, 2971090, 3075952, 3268199, 3844940, 4753744, 5942180, 6536398, 7689880, 11884360, 13072796, 15379760, 16340995, 23768720, 26145592, 32681990, 52291184, 65363980, 130727960, 261455920]

約数ペア:

[(1, 261455920), (2, 130727960), (4, 65363980), (5, 52291184), (8, 32681990), (10, 26145592), (11, 23768720), (16, 16340995), (17, 15379760), (20, 13072796), (22, 11884360), (34, 7689880), (40, 6536398), (44, 5942180), (55, 4753744), (68, 3844940), (80, 3268199), (85, 3075952), (88, 2971090), (110, 2376872), (136, 1922470), (170, 1537976), (176, 1485545), (187, 1398160), (220, 1188436), (272, 961235), (340, 768988), (374, 699080), (440, 594218), (680, 384494), (748, 349540), (880, 297109), (935, 279632), (1360, 192247), (1496, 174770), (1870, 139816), (2992, 87385), (3740, 69908), (7480, 34954), (14960, 17477)]