19998680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{38459}}^1$

素因数の和:38483

約数の個数: 32

約数和(自身を含む): 48459600

約数和(自身を除く): 28460920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 38459, 76918, 153836, 192295, 307672, 384590, 499967, 769180, 999934, 1538360, 1999868, 2499835, 3999736, 4999670, 9999340, 19998680]

約数ペア:

[(1, 19998680), (2, 9999340), (4, 4999670), (5, 3999736), (8, 2499835), (10, 1999868), (13, 1538360), (20, 999934), (26, 769180), (40, 499967), (52, 384590), (65, 307672), (104, 192295), (130, 153836), (260, 76918), (520, 38459)]