21303009

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^2$

素因数の和:119

約数の個数: 72

約数和(自身を含む): 40971840

約数和(自身を除く): 19668831

約数列:

[1, 3, 7, 9, 13, 19, 21, 37, 39, 57, 63, 91, 111, 117, 133, 171, 247, 259, 273, 333, 399, 481, 703, 741, 777, 819, 1197, 1369, 1443, 1729, 2109, 2223, 2331, 3367, 4107, 4329, 4921, 5187, 6327, 9139, 9583, 10101, 12321, 14763, 15561, 17797, 26011, 27417, 28749, 30303, 44289, 53391, 63973, 78033, 82251, 86247, 124579, 160173, 182077, 191919, 234099, 338143, 373737, 546231, 575757, 1014429, 1121211, 1638693, 2367001, 3043287, 7101003, 21303009]

約数ペア:

[(1, 21303009), (3, 7101003), (7, 3043287), (9, 2367001), (13, 1638693), (19, 1121211), (21, 1014429), (37, 575757), (39, 546231), (57, 373737), (63, 338143), (91, 234099), (111, 191919), (117, 182077), (133, 160173), (171, 124579), (247, 86247), (259, 82251), (273, 78033), (333, 63973), (399, 53391), (481, 44289), (703, 30303), (741, 28749), (777, 27417), (819, 26011), (1197, 17797), (1369, 15561), (1443, 14763), (1729, 12321), (2109, 10101), (2223, 9583), (2331, 9139), (3367, 6327), (4107, 5187), (4329, 4921)]