21820816

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{401}}^1$

素因数の和:607

約数の個数: 40

約数和(自身を含む): 44863200

約数和(自身を除く): 23042384

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 179, 304, 358, 401, 716, 802, 1432, 1604, 2864, 3208, 3401, 6416, 6802, 7619, 13604, 15238, 27208, 30476, 54416, 60952, 71779, 121904, 143558, 287116, 574232, 1148464, 1363801, 2727602, 5455204, 10910408, 21820816]

約数ペア:

[(1, 21820816), (2, 10910408), (4, 5455204), (8, 2727602), (16, 1363801), (19, 1148464), (38, 574232), (76, 287116), (152, 143558), (179, 121904), (304, 71779), (358, 60952), (401, 54416), (716, 30476), (802, 27208), (1432, 15238), (1604, 13604), (2864, 7619), (3208, 6802), (3401, 6416)]