21993796

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{211}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 44448768

約数和(自身を除く): 22454972

約数列:

[1, 2, 4, 11, 22, 23, 44, 46, 92, 103, 206, 211, 253, 412, 422, 506, 844, 1012, 1133, 2266, 2321, 2369, 4532, 4642, 4738, 4853, 9284, 9476, 9706, 19412, 21733, 26059, 43466, 52118, 53383, 86932, 104236, 106766, 213532, 239063, 478126, 499859, 956252, 999718, 1999436, 5498449, 10996898, 21993796]

約数ペア:

[(1, 21993796), (2, 10996898), (4, 5498449), (11, 1999436), (22, 999718), (23, 956252), (44, 499859), (46, 478126), (92, 239063), (103, 213532), (206, 106766), (211, 104236), (253, 86932), (412, 53383), (422, 52118), (506, 43466), (844, 26059), (1012, 21733), (1133, 19412), (2266, 9706), (2321, 9476), (2369, 9284), (4532, 4853), (4642, 4738)]