21284235

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{223}}^1$

素因数の和:345

約数の個数: 64

約数和(自身を含む): 43868160

約数和(自身を除く): 22583925

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 101, 105, 135, 189, 223, 303, 315, 505, 669, 707, 909, 945, 1115, 1515, 1561, 2007, 2121, 2727, 3345, 3535, 4545, 4683, 6021, 6363, 7805, 10035, 10605, 13635, 14049, 19089, 22523, 23415, 30105, 31815, 42147, 67569, 70245, 95445, 112615, 157661, 202707, 210735, 337845, 472983, 608121, 788305, 1013535, 1418949, 2364915, 3040605, 4256847, 7094745, 21284235]

約数ペア:

[(1, 21284235), (3, 7094745), (5, 4256847), (7, 3040605), (9, 2364915), (15, 1418949), (21, 1013535), (27, 788305), (35, 608121), (45, 472983), (63, 337845), (101, 210735), (105, 202707), (135, 157661), (189, 112615), (223, 95445), (303, 70245), (315, 67569), (505, 42147), (669, 31815), (707, 30105), (909, 23415), (945, 22523), (1115, 19089), (1515, 14049), (1561, 13635), (2007, 10605), (2121, 10035), (2727, 7805), (3345, 6363), (3535, 6021), (4545, 4683)]