21007790

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{34439}}^1$

素因数の和:34507

約数の個数: 16

約数和(自身を含む): 38435040

約数和(自身を除く): 17427250

約数列:

[1, 2, 5, 10, 61, 122, 305, 610, 34439, 68878, 172195, 344390, 2100779, 4201558, 10503895, 21007790]

約数ペア:

[(1, 21007790), (2, 10503895), (5, 4201558), (10, 2100779), (61, 344390), (122, 172195), (305, 68878), (610, 34439)]