21256755

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1627}}^1$

素因数の和:1715

約数の個数: 32

約数和(自身を含む): 37196544

約数和(自身を除く): 15939789

約数列:

[1, 3, 5, 13, 15, 39, 65, 67, 195, 201, 335, 871, 1005, 1627, 2613, 4355, 4881, 8135, 13065, 21151, 24405, 63453, 105755, 109009, 317265, 327027, 545045, 1417117, 1635135, 4251351, 7085585, 21256755]

約数ペア:

[(1, 21256755), (3, 7085585), (5, 4251351), (13, 1635135), (15, 1417117), (39, 545045), (65, 327027), (67, 317265), (195, 109009), (201, 105755), (335, 63453), (871, 24405), (1005, 21151), (1627, 13065), (2613, 8135), (4355, 4881)]