21996920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49993}}^1$

素因数の和:50015

約数の個数: 32

約数和(自身を含む): 53993520

約数和(自身を除く): 31996600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49993, 99986, 199972, 249965, 399944, 499930, 549923, 999860, 1099846, 1999720, 2199692, 2749615, 4399384, 5499230, 10998460, 21996920]

約数ペア:

[(1, 21996920), (2, 10998460), (4, 5499230), (5, 4399384), (8, 2749615), (10, 2199692), (11, 1999720), (20, 1099846), (22, 999860), (40, 549923), (44, 499930), (55, 399944), (88, 249965), (110, 199972), (220, 99986), (440, 49993)]