81520880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{977}}^1$

素因数の和:1146

約数の個数: 80

約数和(自身を含む): 218289600

約数和(自身を除く): 136768720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 149, 280, 298, 560, 596, 745, 977, 1043, 1192, 1490, 1954, 2086, 2384, 2980, 3908, 4172, 4885, 5215, 5960, 6839, 7816, 8344, 9770, 10430, 11920, 13678, 15632, 16688, 19540, 20860, 27356, 34195, 39080, 41720, 54712, 68390, 78160, 83440, 109424, 136780, 145573, 273560, 291146, 547120, 582292, 727865, 1019011, 1164584, 1455730, 2038022, 2329168, 2911460, 4076044, 5095055, 5822920, 8152088, 10190110, 11645840, 16304176, 20380220, 40760440, 81520880]

約数ペア:

[(1, 81520880), (2, 40760440), (4, 20380220), (5, 16304176), (7, 11645840), (8, 10190110), (10, 8152088), (14, 5822920), (16, 5095055), (20, 4076044), (28, 2911460), (35, 2329168), (40, 2038022), (56, 1455730), (70, 1164584), (80, 1019011), (112, 727865), (140, 582292), (149, 547120), (280, 291146), (298, 273560), (560, 145573), (596, 136780), (745, 109424), (977, 83440), (1043, 78160), (1192, 68390), (1490, 54712), (1954, 41720), (2086, 39080), (2384, 34195), (2980, 27356), (3908, 20860), (4172, 19540), (4885, 16688), (5215, 15632), (5960, 13678), (6839, 11920), (7816, 10430), (8344, 9770)]