21043420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{33941}}^1$

素因数の和:33981

約数の個数: 24

約数和(自身を含む): 45618048

約数和(自身を除く): 24574628

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 33941, 67882, 135764, 169705, 339410, 678820, 1052171, 2104342, 4208684, 5260855, 10521710, 21043420]

約数ペア:

[(1, 21043420), (2, 10521710), (4, 5260855), (5, 4208684), (10, 2104342), (20, 1052171), (31, 678820), (62, 339410), (124, 169705), (155, 135764), (310, 67882), (620, 33941)]