21540813

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53987}}^1$

素因数の和:54016

約数の個数: 16

約数和(自身を含む): 34552320

約数和(自身を除く): 13011507

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53987, 161961, 377909, 1025753, 1133727, 3077259, 7180271, 21540813]

約数ペア:

[(1, 21540813), (3, 7180271), (7, 3077259), (19, 1133727), (21, 1025753), (57, 377909), (133, 161961), (399, 53987)]