21040816

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{719}}^1$

素因数の和:817

約数の個数: 40

約数和(自身を含む): 42854400

約数和(自身を除く): 21813584

約数列:

[1, 2, 4, 8, 16, 31, 59, 62, 118, 124, 236, 248, 472, 496, 719, 944, 1438, 1829, 2876, 3658, 5752, 7316, 11504, 14632, 22289, 29264, 42421, 44578, 84842, 89156, 169684, 178312, 339368, 356624, 678736, 1315051, 2630102, 5260204, 10520408, 21040816]

約数ペア:

[(1, 21040816), (2, 10520408), (4, 5260204), (8, 2630102), (16, 1315051), (31, 678736), (59, 356624), (62, 339368), (118, 178312), (124, 169684), (236, 89156), (248, 84842), (472, 44578), (496, 42421), (719, 29264), (944, 22289), (1438, 14632), (1829, 11504), (2876, 7316), (3658, 5752)]