81553280

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1613}}^1$

素因数の和:1711

約数の個数: 64

約数和(自身を含む): 197553600

約数和(自身を除く): 116000320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 395, 632, 640, 790, 1264, 1580, 1613, 2528, 3160, 3226, 5056, 6320, 6452, 8065, 10112, 12640, 12904, 16130, 25280, 25808, 32260, 50560, 51616, 64520, 103232, 127427, 129040, 206464, 254854, 258080, 509708, 516160, 637135, 1019416, 1032320, 1274270, 2038832, 2548540, 4077664, 5097080, 8155328, 10194160, 16310656, 20388320, 40776640, 81553280]

約数ペア:

[(1, 81553280), (2, 40776640), (4, 20388320), (5, 16310656), (8, 10194160), (10, 8155328), (16, 5097080), (20, 4077664), (32, 2548540), (40, 2038832), (64, 1274270), (79, 1032320), (80, 1019416), (128, 637135), (158, 516160), (160, 509708), (316, 258080), (320, 254854), (395, 206464), (632, 129040), (640, 127427), (790, 103232), (1264, 64520), (1580, 51616), (1613, 50560), (2528, 32260), (3160, 25808), (3226, 25280), (5056, 16130), (6320, 12904), (6452, 12640), (8065, 10112)]