20469940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{1217}}^1$

素因数の和:1284

約数の個数: 36

約数和(自身を含む): 44556876

約数和(自身を除く): 24086936

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 841, 1217, 1682, 2434, 3364, 4205, 4868, 6085, 8410, 12170, 16820, 24340, 35293, 70586, 141172, 176465, 352930, 705860, 1023497, 2046994, 4093988, 5117485, 10234970, 20469940]

約数ペア:

[(1, 20469940), (2, 10234970), (4, 5117485), (5, 4093988), (10, 2046994), (20, 1023497), (29, 705860), (58, 352930), (116, 176465), (145, 141172), (290, 70586), (580, 35293), (841, 24340), (1217, 16820), (1682, 12170), (2434, 8410), (3364, 6085), (4205, 4868)]