21206505

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{21101}}^1$

素因数の和:21176

約数の個数: 16

約数和(自身を含む): 34438464

約数和(自身を除く): 13231959

約数列:

[1, 3, 5, 15, 67, 201, 335, 1005, 21101, 63303, 105505, 316515, 1413767, 4241301, 7068835, 21206505]

約数ペア:

[(1, 21206505), (3, 7068835), (5, 4241301), (15, 1413767), (67, 316515), (201, 105505), (335, 63303), (1005, 21101)]