19899664

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{20389}}^1$

素因数の和:20458

約数の個数: 20

約数和(自身を含む): 39189580

約数和(自身を除く): 19289916

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 20389, 40778, 81556, 163112, 326224, 1243729, 2487458, 4974916, 9949832, 19899664]

約数ペア:

[(1, 19899664), (2, 9949832), (4, 4974916), (8, 2487458), (16, 1243729), (61, 326224), (122, 163112), (244, 81556), (488, 40778), (976, 20389)]