21458140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8867}}^1$

素因数の和:8898

約数の個数: 36

約数和(自身を含む): 49536648

約数和(自身を除く): 28078508

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8867, 17734, 35468, 44335, 88670, 97537, 177340, 195074, 390148, 487685, 975370, 1072907, 1950740, 2145814, 4291628, 5364535, 10729070, 21458140]

約数ペア:

[(1, 21458140), (2, 10729070), (4, 5364535), (5, 4291628), (10, 2145814), (11, 1950740), (20, 1072907), (22, 975370), (44, 487685), (55, 390148), (110, 195074), (121, 177340), (220, 97537), (242, 88670), (484, 44335), (605, 35468), (1210, 17734), (2420, 8867)]