81046840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{289453}}^1$

素因数の和:289471

約数の個数: 32

約数和(自身を含む): 208406880

約数和(自身を除く): 127360040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 289453, 578906, 1157812, 1447265, 2026171, 2315624, 2894530, 4052342, 5789060, 8104684, 10130855, 11578120, 16209368, 20261710, 40523420, 81046840]

約数ペア:

[(1, 81046840), (2, 40523420), (4, 20261710), (5, 16209368), (7, 11578120), (8, 10130855), (10, 8104684), (14, 5789060), (20, 4052342), (28, 2894530), (35, 2315624), (40, 2026171), (56, 1447265), (70, 1157812), (140, 578906), (280, 289453)]