21997580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{99989}}^1$

素因数の和:100009

約数の個数: 24

約数和(自身を含む): 50394960

約数和(自身を除く): 28397380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 99989, 199978, 399956, 499945, 999890, 1099879, 1999780, 2199758, 4399516, 5499395, 10998790, 21997580]

約数ペア:

[(1, 21997580), (2, 10998790), (4, 5499395), (5, 4399516), (10, 2199758), (11, 1999780), (20, 1099879), (22, 999890), (44, 499945), (55, 399956), (110, 199978), (220, 99989)]