20726560

素因数分解:

$2^5\times 5^1\times {\mathrm{281}}^1\times {\mathrm{461}}^1$

素因数の和:757

約数の個数: 48

約数和(自身を含む): 49247352

約数和(自身を除く): 28520792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 281, 461, 562, 922, 1124, 1405, 1844, 2248, 2305, 2810, 3688, 4496, 4610, 5620, 7376, 8992, 9220, 11240, 14752, 18440, 22480, 36880, 44960, 73760, 129541, 259082, 518164, 647705, 1036328, 1295410, 2072656, 2590820, 4145312, 5181640, 10363280, 20726560]

約数ペア:

[(1, 20726560), (2, 10363280), (4, 5181640), (5, 4145312), (8, 2590820), (10, 2072656), (16, 1295410), (20, 1036328), (32, 647705), (40, 518164), (80, 259082), (160, 129541), (281, 73760), (461, 44960), (562, 36880), (922, 22480), (1124, 18440), (1405, 14752), (1844, 11240), (2248, 9220), (2305, 8992), (2810, 7376), (3688, 5620), (4496, 4610)]