21702940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:275

約数の個数: 96

約数和(自身を含む): 56448000

約数和(自身を除く): 34745060

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 41, 70, 76, 82, 95, 133, 140, 164, 190, 199, 205, 266, 287, 380, 398, 410, 532, 574, 665, 779, 796, 820, 995, 1148, 1330, 1393, 1435, 1558, 1990, 2660, 2786, 2870, 3116, 3781, 3895, 3980, 5453, 5572, 5740, 6965, 7562, 7790, 8159, 10906, 13930, 15124, 15580, 16318, 18905, 21812, 26467, 27265, 27860, 32636, 37810, 40795, 52934, 54530, 57113, 75620, 81590, 105868, 109060, 114226, 132335, 155021, 163180, 228452, 264670, 285565, 310042, 529340, 571130, 620084, 775105, 1085147, 1142260, 1550210, 2170294, 3100420, 4340588, 5425735, 10851470, 21702940]

約数ペア:

[(1, 21702940), (2, 10851470), (4, 5425735), (5, 4340588), (7, 3100420), (10, 2170294), (14, 1550210), (19, 1142260), (20, 1085147), (28, 775105), (35, 620084), (38, 571130), (41, 529340), (70, 310042), (76, 285565), (82, 264670), (95, 228452), (133, 163180), (140, 155021), (164, 132335), (190, 114226), (199, 109060), (205, 105868), (266, 81590), (287, 75620), (380, 57113), (398, 54530), (410, 52934), (532, 40795), (574, 37810), (665, 32636), (779, 27860), (796, 27265), (820, 26467), (995, 21812), (1148, 18905), (1330, 16318), (1393, 15580), (1435, 15124), (1558, 13930), (1990, 10906), (2660, 8159), (2786, 7790), (2870, 7562), (3116, 6965), (3781, 5740), (3895, 5572), (3980, 5453)]