19490480

素因数分解:

$2^4\times 5^1\times {\mathrm{243631}}^1$

素因数の和:243644

約数の個数: 20

約数和(自身を含む): 45315552

約数和(自身を除く): 25825072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243631, 487262, 974524, 1218155, 1949048, 2436310, 3898096, 4872620, 9745240, 19490480]

約数ペア:

[(1, 19490480), (2, 9745240), (4, 4872620), (5, 3898096), (8, 2436310), (10, 1949048), (16, 1218155), (20, 974524), (40, 487262), (80, 243631)]