21368176

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{643}}^1$

素因数の和:749

約数の個数: 40

約数和(自身を含む): 43441664

約数和(自身を除く): 22073488

約数列:

[1, 2, 4, 8, 16, 31, 62, 67, 124, 134, 248, 268, 496, 536, 643, 1072, 1286, 2077, 2572, 4154, 5144, 8308, 10288, 16616, 19933, 33232, 39866, 43081, 79732, 86162, 159464, 172324, 318928, 344648, 689296, 1335511, 2671022, 5342044, 10684088, 21368176]

約数ペア:

[(1, 21368176), (2, 10684088), (4, 5342044), (8, 2671022), (16, 1335511), (31, 689296), (62, 344648), (67, 318928), (124, 172324), (134, 159464), (248, 86162), (268, 79732), (496, 43081), (536, 39866), (643, 33232), (1072, 19933), (1286, 16616), (2077, 10288), (2572, 8308), (4154, 5144)]