21760120

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{823}}^1$

素因数の和:1495

約数の個数: 32

約数和(自身を含む): 49093920

約数和(自身を除く): 27333800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 823, 1322, 1646, 2644, 3292, 3305, 4115, 5288, 6584, 6610, 8230, 13220, 16460, 26440, 32920, 544003, 1088006, 2176012, 2720015, 4352024, 5440030, 10880060, 21760120]

約数ペア:

[(1, 21760120), (2, 10880060), (4, 5440030), (5, 4352024), (8, 2720015), (10, 2176012), (20, 1088006), (40, 544003), (661, 32920), (823, 26440), (1322, 16460), (1646, 13220), (2644, 8230), (3292, 6610), (3305, 6584), (4115, 5288)]