128322020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{1489}}^1$

素因数の和:1668

約数の個数: 48

約数和(自身を含む): 280358400

約数和(自身を除く): 152036380

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 139, 155, 278, 310, 556, 620, 695, 1390, 1489, 2780, 2978, 4309, 5956, 7445, 8618, 14890, 17236, 21545, 29780, 43090, 46159, 86180, 92318, 184636, 206971, 230795, 413942, 461590, 827884, 923180, 1034855, 2069710, 4139420, 6416101, 12832202, 25664404, 32080505, 64161010, 128322020]

約数ペア:

[(1, 128322020), (2, 64161010), (4, 32080505), (5, 25664404), (10, 12832202), (20, 6416101), (31, 4139420), (62, 2069710), (124, 1034855), (139, 923180), (155, 827884), (278, 461590), (310, 413942), (556, 230795), (620, 206971), (695, 184636), (1390, 92318), (1489, 86180), (2780, 46159), (2978, 43090), (4309, 29780), (5956, 21545), (7445, 17236), (8618, 14890)]