20529808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1109}}^1$

素因数の和:1219

約数の個数: 40

約数和(自身を含む): 43356600

約数和(自身を除く): 22826792

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 89, 104, 178, 208, 356, 712, 1109, 1157, 1424, 2218, 2314, 4436, 4628, 8872, 9256, 14417, 17744, 18512, 28834, 57668, 98701, 115336, 197402, 230672, 394804, 789608, 1283113, 1579216, 2566226, 5132452, 10264904, 20529808]

約数ペア:

[(1, 20529808), (2, 10264904), (4, 5132452), (8, 2566226), (13, 1579216), (16, 1283113), (26, 789608), (52, 394804), (89, 230672), (104, 197402), (178, 115336), (208, 98701), (356, 57668), (712, 28834), (1109, 18512), (1157, 17744), (1424, 14417), (2218, 9256), (2314, 8872), (4436, 4628)]