21638435

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2503}}^1$

素因数の和:2547

約数の個数: 32

約数和(自身を含む): 33653760

約数和(自身を除く): 12015325

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2503, 8645, 12515, 17521, 32539, 47557, 87605, 162695, 227773, 237785, 332899, 618241, 1138865, 1664495, 3091205, 4327687, 21638435]

約数ペア:

[(1, 21638435), (5, 4327687), (7, 3091205), (13, 1664495), (19, 1138865), (35, 618241), (65, 332899), (91, 237785), (95, 227773), (133, 162695), (247, 87605), (455, 47557), (665, 32539), (1235, 17521), (1729, 12515), (2503, 8645)]