20168253

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1$

素因数の和:151

約数の個数: 72

約数和(自身を含む): 37346400

約数和(自身を除く): 17178147

約数列:

[1, 3, 7, 9, 19, 21, 29, 49, 57, 63, 83, 87, 133, 147, 171, 203, 249, 261, 399, 441, 551, 581, 609, 747, 931, 1197, 1421, 1577, 1653, 1743, 1827, 2407, 2793, 3857, 4067, 4263, 4731, 4959, 5229, 7221, 8379, 11039, 11571, 12201, 12789, 14193, 16849, 21663, 26999, 33117, 34713, 36603, 45733, 50547, 77273, 80997, 99351, 117943, 137199, 151641, 231819, 242991, 320131, 353829, 411597, 695457, 960393, 1061487, 2240917, 2881179, 6722751, 20168253]

約数ペア:

[(1, 20168253), (3, 6722751), (7, 2881179), (9, 2240917), (19, 1061487), (21, 960393), (29, 695457), (49, 411597), (57, 353829), (63, 320131), (83, 242991), (87, 231819), (133, 151641), (147, 137199), (171, 117943), (203, 99351), (249, 80997), (261, 77273), (399, 50547), (441, 45733), (551, 36603), (581, 34713), (609, 33117), (747, 26999), (931, 21663), (1197, 16849), (1421, 14193), (1577, 12789), (1653, 12201), (1743, 11571), (1827, 11039), (2407, 8379), (2793, 7221), (3857, 5229), (4067, 4959), (4263, 4731)]