20901020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6491}}^1$

素因数の和:6530

約数の個数: 48

約数和(自身を含む): 52351488

約数和(自身を除く): 31450468

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6491, 12982, 25964, 32455, 45437, 64910, 90874, 129820, 149293, 181748, 227185, 298586, 454370, 597172, 746465, 908740, 1045051, 1492930, 2090102, 2985860, 4180204, 5225255, 10450510, 20901020]

約数ペア:

[(1, 20901020), (2, 10450510), (4, 5225255), (5, 4180204), (7, 2985860), (10, 2090102), (14, 1492930), (20, 1045051), (23, 908740), (28, 746465), (35, 597172), (46, 454370), (70, 298586), (92, 227185), (115, 181748), (140, 149293), (161, 129820), (230, 90874), (322, 64910), (460, 45437), (644, 32455), (805, 25964), (1610, 12982), (3220, 6491)]