21991611

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{67}}^2\times {\mathrm{71}}^1$

素因数の和:231

約数の個数: 24

約数和(自身を含む): 31497984

約数和(自身を除く): 9506373

約数列:

[1, 3, 23, 67, 69, 71, 201, 213, 1541, 1633, 4489, 4623, 4757, 4899, 13467, 14271, 103247, 109411, 309741, 318719, 328233, 956157, 7330537, 21991611]

約数ペア:

[(1, 21991611), (3, 7330537), (23, 956157), (67, 328233), (69, 318719), (71, 309741), (201, 109411), (213, 103247), (1541, 14271), (1633, 13467), (4489, 4899), (4623, 4757)]