21757288

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 49029120

約数和(自身を除く): 27271832

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 83, 124, 151, 166, 217, 248, 302, 332, 434, 581, 604, 664, 868, 1057, 1162, 1208, 1736, 2114, 2324, 2573, 4228, 4648, 4681, 5146, 8456, 9362, 10292, 12533, 18011, 18724, 20584, 25066, 32767, 36022, 37448, 50132, 65534, 72044, 87731, 100264, 131068, 144088, 175462, 262136, 350924, 388523, 701848, 777046, 1554092, 2719661, 3108184, 5439322, 10878644, 21757288]

約数ペア:

[(1, 21757288), (2, 10878644), (4, 5439322), (7, 3108184), (8, 2719661), (14, 1554092), (28, 777046), (31, 701848), (56, 388523), (62, 350924), (83, 262136), (124, 175462), (151, 144088), (166, 131068), (217, 100264), (248, 87731), (302, 72044), (332, 65534), (434, 50132), (581, 37448), (604, 36022), (664, 32767), (868, 25066), (1057, 20584), (1162, 18724), (1208, 18011), (1736, 12533), (2114, 10292), (2324, 9362), (2573, 8456), (4228, 5146), (4648, 4681)]