21079628

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{1223}}^1$

素因数の和:1397

約数の個数: 24

約数和(自身を含む): 38384640

約数和(自身を除く): 17305012

約数列:

[1, 2, 4, 31, 62, 124, 139, 278, 556, 1223, 2446, 4309, 4892, 8618, 17236, 37913, 75826, 151652, 169997, 339994, 679988, 5269907, 10539814, 21079628]

約数ペア:

[(1, 21079628), (2, 10539814), (4, 5269907), (31, 679988), (62, 339994), (124, 169997), (139, 151652), (278, 75826), (556, 37913), (1223, 17236), (2446, 8618), (4309, 4892)]