21949264

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{523}}^1$

素因数の和:635

約数の個数: 40

約数和(自身を含む): 44313632

約数和(自身を除く): 22364368

約数列:

[1, 2, 4, 8, 16, 43, 61, 86, 122, 172, 244, 344, 488, 523, 688, 976, 1046, 2092, 2623, 4184, 5246, 8368, 10492, 20984, 22489, 31903, 41968, 44978, 63806, 89956, 127612, 179912, 255224, 359824, 510448, 1371829, 2743658, 5487316, 10974632, 21949264]

約数ペア:

[(1, 21949264), (2, 10974632), (4, 5487316), (8, 2743658), (16, 1371829), (43, 510448), (61, 359824), (86, 255224), (122, 179912), (172, 127612), (244, 89956), (344, 63806), (488, 44978), (523, 41968), (688, 31903), (976, 22489), (1046, 20984), (2092, 10492), (2623, 8368), (4184, 5246)]