81806080

素因数分解:

$2^8\times 5^1\times {\mathrm{79}}^1\times {\mathrm{809}}^1$

素因数の和:909

約数の個数: 72

約数和(自身を含む): 198676800

約数和(自身を除く): 116870720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 256, 316, 320, 395, 632, 640, 790, 809, 1264, 1280, 1580, 1618, 2528, 3160, 3236, 4045, 5056, 6320, 6472, 8090, 10112, 12640, 12944, 16180, 20224, 25280, 25888, 32360, 50560, 51776, 63911, 64720, 101120, 103552, 127822, 129440, 207104, 255644, 258880, 319555, 511288, 517760, 639110, 1022576, 1035520, 1278220, 2045152, 2556440, 4090304, 5112880, 8180608, 10225760, 16361216, 20451520, 40903040, 81806080]

約数ペア:

[(1, 81806080), (2, 40903040), (4, 20451520), (5, 16361216), (8, 10225760), (10, 8180608), (16, 5112880), (20, 4090304), (32, 2556440), (40, 2045152), (64, 1278220), (79, 1035520), (80, 1022576), (128, 639110), (158, 517760), (160, 511288), (256, 319555), (316, 258880), (320, 255644), (395, 207104), (632, 129440), (640, 127822), (790, 103552), (809, 101120), (1264, 64720), (1280, 63911), (1580, 51776), (1618, 50560), (2528, 32360), (3160, 25888), (3236, 25280), (4045, 20224), (5056, 16180), (6320, 12944), (6472, 12640), (8090, 10112)]