21760420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{98911}}^1$

素因数の和:98931

約数の個数: 24

約数和(自身を含む): 49851648

約数和(自身を除く): 28091228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 98911, 197822, 395644, 494555, 989110, 1088021, 1978220, 2176042, 4352084, 5440105, 10880210, 21760420]

約数ペア:

[(1, 21760420), (2, 10880210), (4, 5440105), (5, 4352084), (10, 2176042), (11, 1978220), (20, 1088021), (22, 989110), (44, 494555), (55, 395644), (110, 197822), (220, 98911)]