81920405

素因数分解:

$5^1\times 7^3\times {\mathrm{37}}^1\times {\mathrm{1291}}^1$

素因数の和:1354

約数の個数: 32

約数和(自身を含む): 117830400

約数和(自身を除く): 35909995

約数列:

[1, 5, 7, 35, 37, 49, 185, 245, 259, 343, 1291, 1295, 1715, 1813, 6455, 9037, 9065, 12691, 45185, 47767, 63259, 63455, 238835, 316295, 334369, 442813, 1671845, 2214065, 2340583, 11702915, 16384081, 81920405]

約数ペア:

[(1, 81920405), (5, 16384081), (7, 11702915), (35, 2340583), (37, 2214065), (49, 1671845), (185, 442813), (245, 334369), (259, 316295), (343, 238835), (1291, 63455), (1295, 63259), (1715, 47767), (1813, 45185), (6455, 12691), (9037, 9065)]