291220420

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{43991}}^1$

素因数の和:44331

約数の個数: 24

約数和(自身を含む): 613424448

約数和(自身を除く): 322204028

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3310, 6620, 43991, 87982, 175964, 219955, 439910, 879820, 14561021, 29122042, 58244084, 72805105, 145610210, 291220420]

約数ペア:

[(1, 291220420), (2, 145610210), (4, 72805105), (5, 58244084), (10, 29122042), (20, 14561021), (331, 879820), (662, 439910), (1324, 219955), (1655, 175964), (3310, 87982), (6620, 43991)]