19980506

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{353}}^1$

素因数の和:686

約数の個数: 32

約数和(自身を含む): 37110528

約数和(自身を除く): 17130022

約数列:

[1, 2, 7, 13, 14, 26, 91, 182, 311, 353, 622, 706, 2177, 2471, 4043, 4354, 4589, 4942, 8086, 9178, 28301, 32123, 56602, 64246, 109783, 219566, 768481, 1427179, 1536962, 2854358, 9990253, 19980506]

約数ペア:

[(1, 19980506), (2, 9990253), (7, 2854358), (13, 1536962), (14, 1427179), (26, 768481), (91, 219566), (182, 109783), (311, 64246), (353, 56602), (622, 32123), (706, 28301), (2177, 9178), (2471, 8086), (4043, 4942), (4354, 4589)]