21654213

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^2\times {\mathrm{37}}^1$

素因数の和:138

約数の個数: 48

約数和(自身を含む): 36224640

約数和(自身を除く): 14570427

約数列:

[1, 3, 7, 21, 29, 31, 37, 87, 93, 111, 203, 217, 259, 609, 651, 777, 899, 961, 1073, 1147, 2697, 2883, 3219, 3441, 6293, 6727, 7511, 8029, 18879, 20181, 22533, 24087, 27869, 33263, 35557, 83607, 99789, 106671, 195083, 232841, 248899, 585249, 698523, 746697, 1031153, 3093459, 7218071, 21654213]

約数ペア:

[(1, 21654213), (3, 7218071), (7, 3093459), (21, 1031153), (29, 746697), (31, 698523), (37, 585249), (87, 248899), (93, 232841), (111, 195083), (203, 106671), (217, 99789), (259, 83607), (609, 35557), (651, 33263), (777, 27869), (899, 24087), (961, 22533), (1073, 20181), (1147, 18879), (2697, 8029), (2883, 7511), (3219, 6727), (3441, 6293)]