18861220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{677}}^1$

素因数の和:892

約数の個数: 48

約数和(自身を含む): 45561600

約数和(自身を除く): 26700380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 398, 677, 796, 995, 1354, 1393, 1990, 2708, 2786, 3385, 3980, 4739, 5572, 6770, 6965, 9478, 13540, 13930, 18956, 23695, 27860, 47390, 94780, 134723, 269446, 538892, 673615, 943061, 1347230, 1886122, 2694460, 3772244, 4715305, 9430610, 18861220]

約数ペア:

[(1, 18861220), (2, 9430610), (4, 4715305), (5, 3772244), (7, 2694460), (10, 1886122), (14, 1347230), (20, 943061), (28, 673615), (35, 538892), (70, 269446), (140, 134723), (199, 94780), (398, 47390), (677, 27860), (796, 23695), (995, 18956), (1354, 13930), (1393, 13540), (1990, 9478), (2708, 6965), (2786, 6770), (3385, 5572), (3980, 4739)]