81911680

素因数分解:

$2^7\times 5^1\times {\mathrm{131}}^1\times {\mathrm{977}}^1$

素因数の和:1127

約数の個数: 64

約数和(自身を含む): 197516880

約数和(自身を除く): 115605200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 131, 160, 262, 320, 524, 640, 655, 977, 1048, 1310, 1954, 2096, 2620, 3908, 4192, 4885, 5240, 7816, 8384, 9770, 10480, 15632, 16768, 19540, 20960, 31264, 39080, 41920, 62528, 78160, 83840, 125056, 127987, 156320, 255974, 312640, 511948, 625280, 639935, 1023896, 1279870, 2047792, 2559740, 4095584, 5119480, 8191168, 10238960, 16382336, 20477920, 40955840, 81911680]

約数ペア:

[(1, 81911680), (2, 40955840), (4, 20477920), (5, 16382336), (8, 10238960), (10, 8191168), (16, 5119480), (20, 4095584), (32, 2559740), (40, 2047792), (64, 1279870), (80, 1023896), (128, 639935), (131, 625280), (160, 511948), (262, 312640), (320, 255974), (524, 156320), (640, 127987), (655, 125056), (977, 83840), (1048, 78160), (1310, 62528), (1954, 41920), (2096, 39080), (2620, 31264), (3908, 20960), (4192, 19540), (4885, 16768), (5240, 15632), (7816, 10480), (8384, 9770)]