21920899

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{359}}^1$

素因数の和:451

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 8077181

約数列:

[1, 7, 11, 13, 61, 77, 91, 143, 359, 427, 671, 793, 1001, 2513, 3949, 4667, 4697, 5551, 8723, 21899, 27643, 32669, 51337, 61061, 153293, 240889, 284687, 359359, 1686223, 1992809, 3131557, 21920899]

約数ペア:

[(1, 21920899), (7, 3131557), (11, 1992809), (13, 1686223), (61, 359359), (77, 284687), (91, 240889), (143, 153293), (359, 61061), (427, 51337), (671, 32669), (793, 27643), (1001, 21899), (2513, 8723), (3949, 5551), (4667, 4697)]