20170640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:400

約数の個数: 80

約数和(自身を含む): 54163200

約数和(自身を除く): 33992560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 181, 199, 280, 362, 398, 560, 724, 796, 905, 995, 1267, 1393, 1448, 1592, 1810, 1990, 2534, 2786, 2896, 3184, 3620, 3980, 5068, 5572, 6335, 6965, 7240, 7960, 10136, 11144, 12670, 13930, 14480, 15920, 20272, 22288, 25340, 27860, 36019, 50680, 55720, 72038, 101360, 111440, 144076, 180095, 252133, 288152, 360190, 504266, 576304, 720380, 1008532, 1260665, 1440760, 2017064, 2521330, 2881520, 4034128, 5042660, 10085320, 20170640]

約数ペア:

[(1, 20170640), (2, 10085320), (4, 5042660), (5, 4034128), (7, 2881520), (8, 2521330), (10, 2017064), (14, 1440760), (16, 1260665), (20, 1008532), (28, 720380), (35, 576304), (40, 504266), (56, 360190), (70, 288152), (80, 252133), (112, 180095), (140, 144076), (181, 111440), (199, 101360), (280, 72038), (362, 55720), (398, 50680), (560, 36019), (724, 27860), (796, 25340), (905, 22288), (995, 20272), (1267, 15920), (1393, 14480), (1448, 13930), (1592, 12670), (1810, 11144), (1990, 10136), (2534, 7960), (2786, 7240), (2896, 6965), (3184, 6335), (3620, 5572), (3980, 5068)]