19845980

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{263}}^1$

素因数の和:304

約数の個数: 96

約数和(自身を含む): 53222400

約数和(自身を除く): 33376420

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 263, 308, 343, 385, 490, 526, 539, 686, 770, 980, 1052, 1078, 1315, 1372, 1540, 1715, 1841, 2156, 2630, 2695, 2893, 3430, 3682, 3773, 5260, 5390, 5786, 6860, 7364, 7546, 9205, 10780, 11572, 12887, 14465, 15092, 18410, 18865, 20251, 25774, 28930, 36820, 37730, 40502, 51548, 57860, 64435, 75460, 81004, 90209, 101255, 128870, 141757, 180418, 202510, 257740, 283514, 360836, 405020, 451045, 567028, 708785, 902090, 992299, 1417570, 1804180, 1984598, 2835140, 3969196, 4961495, 9922990, 19845980]

約数ペア:

[(1, 19845980), (2, 9922990), (4, 4961495), (5, 3969196), (7, 2835140), (10, 1984598), (11, 1804180), (14, 1417570), (20, 992299), (22, 902090), (28, 708785), (35, 567028), (44, 451045), (49, 405020), (55, 360836), (70, 283514), (77, 257740), (98, 202510), (110, 180418), (140, 141757), (154, 128870), (196, 101255), (220, 90209), (245, 81004), (263, 75460), (308, 64435), (343, 57860), (385, 51548), (490, 40502), (526, 37730), (539, 36820), (686, 28930), (770, 25774), (980, 20251), (1052, 18865), (1078, 18410), (1315, 15092), (1372, 14465), (1540, 12887), (1715, 11572), (1841, 10780), (2156, 9205), (2630, 7546), (2695, 7364), (2893, 6860), (3430, 5786), (3682, 5390), (3773, 5260)]