21407813

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{3037}}^1$

素因数の和:3116

約数の個数: 16

約数和(自身を含む): 26248320

約数和(自身を除く): 4840507

約数列:

[1, 7, 19, 53, 133, 371, 1007, 3037, 7049, 21259, 57703, 160961, 403921, 1126727, 3058259, 21407813]

約数ペア:

[(1, 21407813), (7, 3058259), (19, 1126727), (53, 403921), (133, 160961), (371, 57703), (1007, 21259), (3037, 7049)]