18530980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{271}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 42223104

約数和(自身を除く): 23692124

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 263, 271, 526, 542, 1052, 1084, 1315, 1355, 2630, 2710, 3419, 3523, 5260, 5420, 6838, 7046, 13676, 14092, 17095, 17615, 34190, 35230, 68380, 70460, 71273, 142546, 285092, 356365, 712730, 926549, 1425460, 1853098, 3706196, 4632745, 9265490, 18530980]

約数ペア:

[(1, 18530980), (2, 9265490), (4, 4632745), (5, 3706196), (10, 1853098), (13, 1425460), (20, 926549), (26, 712730), (52, 356365), (65, 285092), (130, 142546), (260, 71273), (263, 70460), (271, 68380), (526, 35230), (542, 34190), (1052, 17615), (1084, 17095), (1315, 14092), (1355, 13676), (2630, 7046), (2710, 6838), (3419, 5420), (3523, 5260)]