21451256

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{1291}}^1$

素因数の和:1395

約数の個数: 32

約数和(自身を含む): 42170880

約数和(自身を除く): 20719624

約数列:

[1, 2, 4, 8, 31, 62, 67, 124, 134, 248, 268, 536, 1291, 2077, 2582, 4154, 5164, 8308, 10328, 16616, 40021, 80042, 86497, 160084, 172994, 320168, 345988, 691976, 2681407, 5362814, 10725628, 21451256]

約数ペア:

[(1, 21451256), (2, 10725628), (4, 5362814), (8, 2681407), (31, 691976), (62, 345988), (67, 320168), (124, 172994), (134, 160084), (248, 86497), (268, 80042), (536, 40021), (1291, 16616), (2077, 10328), (2582, 8308), (4154, 5164)]