21015708

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{347}}^1$

素因数の和:471

約数の個数: 72

約数和(自身を含む): 57762432

約数和(自身を除く): 36746724

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 103, 147, 196, 206, 294, 309, 347, 412, 588, 618, 694, 721, 1041, 1236, 1388, 1442, 2082, 2163, 2429, 2884, 4164, 4326, 4858, 5047, 7287, 8652, 9716, 10094, 14574, 15141, 17003, 20188, 29148, 30282, 34006, 35741, 51009, 60564, 68012, 71482, 102018, 107223, 142964, 204036, 214446, 250187, 428892, 500374, 750561, 1000748, 1501122, 1751309, 3002244, 3502618, 5253927, 7005236, 10507854, 21015708]

約数ペア:

[(1, 21015708), (2, 10507854), (3, 7005236), (4, 5253927), (6, 3502618), (7, 3002244), (12, 1751309), (14, 1501122), (21, 1000748), (28, 750561), (42, 500374), (49, 428892), (84, 250187), (98, 214446), (103, 204036), (147, 142964), (196, 107223), (206, 102018), (294, 71482), (309, 68012), (347, 60564), (412, 51009), (588, 35741), (618, 34006), (694, 30282), (721, 29148), (1041, 20188), (1236, 17003), (1388, 15141), (1442, 14574), (2082, 10094), (2163, 9716), (2429, 8652), (2884, 7287), (4164, 5047), (4326, 4858)]