20401264

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2281}}^1$

素因数の和:2345

約数の個数: 40

約数和(自身を含む): 43577072

約数和(自身を除く): 23175808

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2281, 4472, 4562, 8944, 9124, 18248, 29653, 36496, 59306, 98083, 118612, 196166, 237224, 392332, 474448, 784664, 1275079, 1569328, 2550158, 5100316, 10200632, 20401264]

約数ペア:

[(1, 20401264), (2, 10200632), (4, 5100316), (8, 2550158), (13, 1569328), (16, 1275079), (26, 784664), (43, 474448), (52, 392332), (86, 237224), (104, 196166), (172, 118612), (208, 98083), (344, 59306), (559, 36496), (688, 29653), (1118, 18248), (2236, 9124), (2281, 8944), (4472, 4562)]