20685025840

素因数分解:

$2^4\times 5^1\times {\mathrm{30829}}^1\times {\mathrm{8387}}^1$

素因数の和:39229

約数の個数: 40

約数和(自身を含む): 48099979440

約数和(自身を除く): 27414953600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8387, 16774, 30829, 33548, 41935, 61658, 67096, 83870, 123316, 134192, 154145, 167740, 246632, 308290, 335480, 493264, 616580, 670960, 1233160, 2466320, 258562823, 517125646, 1034251292, 1292814115, 2068502584, 2585628230, 4137005168, 5171256460, 10342512920, 20685025840]

約数ペア:

[(1, 20685025840), (2, 10342512920), (4, 5171256460), (5, 4137005168), (8, 2585628230), (10, 2068502584), (16, 1292814115), (20, 1034251292), (40, 517125646), (80, 258562823), (8387, 2466320), (16774, 1233160), (30829, 670960), (33548, 616580), (41935, 493264), (61658, 335480), (67096, 308290), (83870, 246632), (123316, 167740), (134192, 154145)]