20405140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6337}}^1$

素因数の和:6376

約数の個数: 48

約数和(自身を含む): 51109632

約数和(自身を除く): 30704492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6337, 12674, 25348, 31685, 44359, 63370, 88718, 126740, 145751, 177436, 221795, 291502, 443590, 583004, 728755, 887180, 1020257, 1457510, 2040514, 2915020, 4081028, 5101285, 10202570, 20405140]

約数ペア:

[(1, 20405140), (2, 10202570), (4, 5101285), (5, 4081028), (7, 2915020), (10, 2040514), (14, 1457510), (20, 1020257), (23, 887180), (28, 728755), (35, 583004), (46, 443590), (70, 291502), (92, 221795), (115, 177436), (140, 145751), (161, 126740), (230, 88718), (322, 63370), (460, 44359), (644, 31685), (805, 25348), (1610, 12674), (3220, 6337)]