81920780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{1117}}^1$

素因数の和:1338

約数の個数: 48

約数和(自身を含む): 182189280

約数和(自身を除く): 100268500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 193, 380, 386, 772, 965, 1117, 1930, 2234, 3667, 3860, 4468, 5585, 7334, 11170, 14668, 18335, 21223, 22340, 36670, 42446, 73340, 84892, 106115, 212230, 215581, 424460, 431162, 862324, 1077905, 2155810, 4096039, 4311620, 8192078, 16384156, 20480195, 40960390, 81920780]

約数ペア:

[(1, 81920780), (2, 40960390), (4, 20480195), (5, 16384156), (10, 8192078), (19, 4311620), (20, 4096039), (38, 2155810), (76, 1077905), (95, 862324), (190, 431162), (193, 424460), (380, 215581), (386, 212230), (772, 106115), (965, 84892), (1117, 73340), (1930, 42446), (2234, 36670), (3667, 22340), (3860, 21223), (4468, 18335), (5585, 14668), (7334, 11170)]