18815020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{263}}^1$

素因数の和:359

約数の個数: 72

約数和(自身を含む): 46769184

約数和(自身を除く): 27954164

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 73, 98, 140, 146, 196, 245, 263, 292, 365, 490, 511, 526, 730, 980, 1022, 1052, 1315, 1460, 1841, 2044, 2555, 2630, 3577, 3682, 5110, 5260, 7154, 7364, 9205, 10220, 12887, 14308, 17885, 18410, 19199, 25774, 35770, 36820, 38398, 51548, 64435, 71540, 76796, 95995, 128870, 134393, 191990, 257740, 268786, 383980, 537572, 671965, 940751, 1343930, 1881502, 2687860, 3763004, 4703755, 9407510, 18815020]

約数ペア:

[(1, 18815020), (2, 9407510), (4, 4703755), (5, 3763004), (7, 2687860), (10, 1881502), (14, 1343930), (20, 940751), (28, 671965), (35, 537572), (49, 383980), (70, 268786), (73, 257740), (98, 191990), (140, 134393), (146, 128870), (196, 95995), (245, 76796), (263, 71540), (292, 64435), (365, 51548), (490, 38398), (511, 36820), (526, 35770), (730, 25774), (980, 19199), (1022, 18410), (1052, 17885), (1315, 14308), (1460, 12887), (1841, 10220), (2044, 9205), (2555, 7364), (2630, 7154), (3577, 5260), (3682, 5110)]