21313360

素因数分解:

$2^4\times 5^1\times {\mathrm{266417}}^1$

素因数の和:266430

約数の個数: 20

約数和(自身を含む): 49553748

約数和(自身を除く): 28240388

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266417, 532834, 1065668, 1332085, 2131336, 2664170, 4262672, 5328340, 10656680, 21313360]

約数ペア:

[(1, 21313360), (2, 10656680), (4, 5328340), (5, 4262672), (8, 2664170), (10, 2131336), (16, 1332085), (20, 1065668), (40, 532834), (80, 266417)]