21190972

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43783}}^1$

素因数の和:43809

約数の個数: 18

約数和(自身を含む): 40762904

約数和(自身を除く): 19571932

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43783, 87566, 175132, 481613, 963226, 1926452, 5297743, 10595486, 21190972]

約数ペア:

[(1, 21190972), (2, 10595486), (4, 5297743), (11, 1926452), (22, 963226), (44, 481613), (121, 175132), (242, 87566), (484, 43783)]