21664916

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1123}}^1$

素因数の和:1200

約数の個数: 48

約数和(自身を含む): 47585664

約数和(自身を除く): 25920748

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 53, 91, 106, 182, 212, 364, 371, 689, 742, 1123, 1378, 1484, 2246, 2756, 4492, 4823, 7861, 9646, 14599, 15722, 19292, 29198, 31444, 58396, 59519, 102193, 119038, 204386, 238076, 408772, 416633, 773747, 833266, 1547494, 1666532, 3094988, 5416229, 10832458, 21664916]

約数ペア:

[(1, 21664916), (2, 10832458), (4, 5416229), (7, 3094988), (13, 1666532), (14, 1547494), (26, 833266), (28, 773747), (52, 416633), (53, 408772), (91, 238076), (106, 204386), (182, 119038), (212, 102193), (364, 59519), (371, 58396), (689, 31444), (742, 29198), (1123, 19292), (1378, 15722), (1484, 14599), (2246, 9646), (2756, 7861), (4492, 4823)]