21315728

素因数分解:

$2^4\times 7^1\times {\mathrm{83}}^1\times {\mathrm{2293}}^1$

素因数の和:2391

約数の個数: 40

約数和(自身を含む): 47788608

約数和(自身を除く): 26472880

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 83, 112, 166, 332, 581, 664, 1162, 1328, 2293, 2324, 4586, 4648, 9172, 9296, 16051, 18344, 32102, 36688, 64204, 128408, 190319, 256816, 380638, 761276, 1332233, 1522552, 2664466, 3045104, 5328932, 10657864, 21315728]

約数ペア:

[(1, 21315728), (2, 10657864), (4, 5328932), (7, 3045104), (8, 2664466), (14, 1522552), (16, 1332233), (28, 761276), (56, 380638), (83, 256816), (112, 190319), (166, 128408), (332, 64204), (581, 36688), (664, 32102), (1162, 18344), (1328, 16051), (2293, 9296), (2324, 9172), (4586, 4648)]