81042920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{289439}}^1$

素因数の和:289457

約数の個数: 32

約数和(自身を含む): 208396800

約数和(自身を除く): 127353880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 289439, 578878, 1157756, 1447195, 2026073, 2315512, 2894390, 4052146, 5788780, 8104292, 10130365, 11577560, 16208584, 20260730, 40521460, 81042920]

約数ペア:

[(1, 81042920), (2, 40521460), (4, 20260730), (5, 16208584), (7, 11577560), (8, 10130365), (10, 8104292), (14, 5788780), (20, 4052146), (28, 2894390), (35, 2315512), (40, 2026073), (56, 1447195), (70, 1157756), (140, 578878), (280, 289439)]