21385784

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:268

約数の個数: 64

約数和(自身を含む): 48168960

約数和(自身を除く): 26783176

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 97, 124, 127, 194, 217, 248, 254, 388, 434, 508, 679, 776, 868, 889, 1016, 1358, 1736, 1778, 2716, 3007, 3556, 3937, 5432, 6014, 7112, 7874, 12028, 12319, 15748, 21049, 24056, 24638, 27559, 31496, 42098, 49276, 55118, 84196, 86233, 98552, 110236, 168392, 172466, 220472, 344932, 381889, 689864, 763778, 1527556, 2673223, 3055112, 5346446, 10692892, 21385784]

約数ペア:

[(1, 21385784), (2, 10692892), (4, 5346446), (7, 3055112), (8, 2673223), (14, 1527556), (28, 763778), (31, 689864), (56, 381889), (62, 344932), (97, 220472), (124, 172466), (127, 168392), (194, 110236), (217, 98552), (248, 86233), (254, 84196), (388, 55118), (434, 49276), (508, 42098), (679, 31496), (776, 27559), (868, 24638), (889, 24056), (1016, 21049), (1358, 15748), (1736, 12319), (1778, 12028), (2716, 7874), (3007, 7112), (3556, 6014), (3937, 5432)]