81231920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13187}}^1$

素因数の和:13218

約数の個数: 80

約数和(自身を含む): 235484928

約数和(自身を除く): 154253008

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 176, 220, 280, 308, 385, 440, 560, 616, 770, 880, 1232, 1540, 3080, 6160, 13187, 26374, 52748, 65935, 92309, 105496, 131870, 145057, 184618, 210992, 263740, 290114, 369236, 461545, 527480, 580228, 725285, 738472, 923090, 1015399, 1054960, 1160456, 1450570, 1476944, 1846180, 2030798, 2320912, 2901140, 3692360, 4061596, 5076995, 5802280, 7384720, 8123192, 10153990, 11604560, 16246384, 20307980, 40615960, 81231920]

約数ペア:

[(1, 81231920), (2, 40615960), (4, 20307980), (5, 16246384), (7, 11604560), (8, 10153990), (10, 8123192), (11, 7384720), (14, 5802280), (16, 5076995), (20, 4061596), (22, 3692360), (28, 2901140), (35, 2320912), (40, 2030798), (44, 1846180), (55, 1476944), (56, 1450570), (70, 1160456), (77, 1054960), (80, 1015399), (88, 923090), (110, 738472), (112, 725285), (140, 580228), (154, 527480), (176, 461545), (220, 369236), (280, 290114), (308, 263740), (385, 210992), (440, 184618), (560, 145057), (616, 131870), (770, 105496), (880, 92309), (1232, 65935), (1540, 52748), (3080, 26374), (6160, 13187)]