21081697

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:265

約数の個数: 32

約数和(自身を含む): 27820800

約数和(自身を除く): 6739103

約数列:

[1, 7, 13, 19, 89, 91, 133, 137, 247, 623, 959, 1157, 1691, 1729, 1781, 2603, 8099, 11837, 12193, 12467, 18221, 21983, 33839, 85351, 153881, 158509, 231667, 236873, 1109563, 1621669, 3011671, 21081697]

約数ペア:

[(1, 21081697), (7, 3011671), (13, 1621669), (19, 1109563), (89, 236873), (91, 231667), (133, 158509), (137, 153881), (247, 85351), (623, 33839), (959, 21983), (1157, 18221), (1691, 12467), (1729, 12193), (1781, 11837), (2603, 8099)]