21258055

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2459}}^1$

素因数の和:2503

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 11804345

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2459, 8645, 12295, 17213, 31967, 46721, 86065, 159835, 223769, 233605, 327047, 607373, 1118845, 1635235, 3036865, 4251611, 21258055]

約数ペア:

[(1, 21258055), (5, 4251611), (7, 3036865), (13, 1635235), (19, 1118845), (35, 607373), (65, 327047), (91, 233605), (95, 223769), (133, 159835), (247, 86065), (455, 46721), (665, 31967), (1235, 17213), (1729, 12295), (2459, 8645)]