21782278

素因数分解:

$2^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{12251}}^1$

素因数の和:12387

約数の個数: 16

約数和(自身を含む): 37638144

約数和(自身を除く): 15855866

約数列:

[1, 2, 7, 14, 127, 254, 889, 1778, 12251, 24502, 85757, 171514, 1555877, 3111754, 10891139, 21782278]

約数ペア:

[(1, 21782278), (2, 10891139), (7, 3111754), (14, 1555877), (127, 171514), (254, 85757), (889, 24502), (1778, 12251)]