21139954

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:406

約数の個数: 32

約数和(自身を含む): 36126720

約数和(自身を除く): 14986766

約数列:

[1, 2, 11, 22, 31, 62, 139, 223, 278, 341, 446, 682, 1529, 2453, 3058, 4309, 4906, 6913, 8618, 13826, 30997, 47399, 61994, 76043, 94798, 152086, 340967, 681934, 960907, 1921814, 10569977, 21139954]

約数ペア:

[(1, 21139954), (2, 10569977), (11, 1921814), (22, 960907), (31, 681934), (62, 340967), (139, 152086), (223, 94798), (278, 76043), (341, 61994), (446, 47399), (682, 30997), (1529, 13826), (2453, 8618), (3058, 6913), (4309, 4906)]