20958420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{359}}^1$

素因数の和:517

約数の個数: 96

約数和(自身を含む): 67737600

約数和(自身を除く): 46779180

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 139, 140, 210, 278, 359, 417, 420, 556, 695, 718, 834, 973, 1077, 1390, 1436, 1668, 1795, 1946, 2085, 2154, 2513, 2780, 2919, 3590, 3892, 4170, 4308, 4865, 5026, 5385, 5838, 7180, 7539, 8340, 9730, 10052, 10770, 11676, 12565, 14595, 15078, 19460, 21540, 25130, 29190, 30156, 37695, 49901, 50260, 58380, 75390, 99802, 149703, 150780, 199604, 249505, 299406, 349307, 499010, 598812, 698614, 748515, 998020, 1047921, 1397228, 1497030, 1746535, 2095842, 2994060, 3493070, 4191684, 5239605, 6986140, 10479210, 20958420]

約数ペア:

[(1, 20958420), (2, 10479210), (3, 6986140), (4, 5239605), (5, 4191684), (6, 3493070), (7, 2994060), (10, 2095842), (12, 1746535), (14, 1497030), (15, 1397228), (20, 1047921), (21, 998020), (28, 748515), (30, 698614), (35, 598812), (42, 499010), (60, 349307), (70, 299406), (84, 249505), (105, 199604), (139, 150780), (140, 149703), (210, 99802), (278, 75390), (359, 58380), (417, 50260), (420, 49901), (556, 37695), (695, 30156), (718, 29190), (834, 25130), (973, 21540), (1077, 19460), (1390, 15078), (1436, 14595), (1668, 12565), (1795, 11676), (1946, 10770), (2085, 10052), (2154, 9730), (2513, 8340), (2780, 7539), (2919, 7180), (3590, 5838), (3892, 5385), (4170, 5026), (4308, 4865)]