20563504

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{907}}^1$

素因数の和:1037

約数の個数: 40

約数和(自身を含む): 43347920

約数和(自身を除く): 22784416

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 109, 208, 218, 436, 872, 907, 1417, 1744, 1814, 2834, 3628, 5668, 7256, 11336, 11791, 14512, 22672, 23582, 47164, 94328, 98863, 188656, 197726, 395452, 790904, 1285219, 1581808, 2570438, 5140876, 10281752, 20563504]

約数ペア:

[(1, 20563504), (2, 10281752), (4, 5140876), (8, 2570438), (13, 1581808), (16, 1285219), (26, 790904), (52, 395452), (104, 197726), (109, 188656), (208, 98863), (218, 94328), (436, 47164), (872, 23582), (907, 22672), (1417, 14512), (1744, 11791), (1814, 11336), (2834, 7256), (3628, 5668)]