21351687

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{907}}^1$

素因数の和:995

約数の個数: 32

約数和(自身を含む): 34867200

約数和(自身を除く): 13515513

約数列:

[1, 3, 7, 19, 21, 57, 59, 133, 177, 399, 413, 907, 1121, 1239, 2721, 3363, 6349, 7847, 17233, 19047, 23541, 51699, 53513, 120631, 160539, 361893, 374591, 1016747, 1123773, 3050241, 7117229, 21351687]

約数ペア:

[(1, 21351687), (3, 7117229), (7, 3050241), (19, 1123773), (21, 1016747), (57, 374591), (59, 361893), (133, 160539), (177, 120631), (399, 53513), (413, 51699), (907, 23541), (1121, 19047), (1239, 17233), (2721, 7847), (3363, 6349)]