21229480

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{1973}}^1$

素因数の和:2253

約数の個数: 32

約数和(自身を含む): 47968200

約数和(自身を除く): 26738720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 1973, 2152, 2690, 3946, 5380, 7892, 9865, 10760, 15784, 19730, 39460, 78920, 530737, 1061474, 2122948, 2653685, 4245896, 5307370, 10614740, 21229480]

約数ペア:

[(1, 21229480), (2, 10614740), (4, 5307370), (5, 4245896), (8, 2653685), (10, 2122948), (20, 1061474), (40, 530737), (269, 78920), (538, 39460), (1076, 19730), (1345, 15784), (1973, 10760), (2152, 9865), (2690, 7892), (3946, 5380)]