81012520

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{6389}}^1$

素因数の和:6717

約数の個数: 32

約数和(自身を含む): 182881800

約数和(自身を除く): 101869280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 2536, 3170, 6340, 6389, 12680, 12778, 25556, 31945, 51112, 63890, 127780, 255560, 2025313, 4050626, 8101252, 10126565, 16202504, 20253130, 40506260, 81012520]

約数ペア:

[(1, 81012520), (2, 40506260), (4, 20253130), (5, 16202504), (8, 10126565), (10, 8101252), (20, 4050626), (40, 2025313), (317, 255560), (634, 127780), (1268, 63890), (1585, 51112), (2536, 31945), (3170, 25556), (6340, 12778), (6389, 12680)]