18787990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{3361}}^1$

素因数の和:3424

約数の個数: 32

約数和(自身を含む): 37277856

約数和(自身を除く): 18489866

約数列:

[1, 2, 5, 10, 13, 26, 43, 65, 86, 130, 215, 430, 559, 1118, 2795, 3361, 5590, 6722, 16805, 33610, 43693, 87386, 144523, 218465, 289046, 436930, 722615, 1445230, 1878799, 3757598, 9393995, 18787990]

約数ペア:

[(1, 18787990), (2, 9393995), (5, 3757598), (10, 1878799), (13, 1445230), (26, 722615), (43, 436930), (65, 289046), (86, 218465), (130, 144523), (215, 87386), (430, 43693), (559, 33610), (1118, 16805), (2795, 6722), (3361, 5590)]