19881580

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{401}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 43628256

約数和(自身を除く): 23746676

約数列:

[1, 2, 4, 5, 10, 20, 37, 67, 74, 134, 148, 185, 268, 335, 370, 401, 670, 740, 802, 1340, 1604, 2005, 2479, 4010, 4958, 8020, 9916, 12395, 14837, 24790, 26867, 29674, 49580, 53734, 59348, 74185, 107468, 134335, 148370, 268670, 296740, 537340, 994079, 1988158, 3976316, 4970395, 9940790, 19881580]

約数ペア:

[(1, 19881580), (2, 9940790), (4, 4970395), (5, 3976316), (10, 1988158), (20, 994079), (37, 537340), (67, 296740), (74, 268670), (134, 148370), (148, 134335), (185, 107468), (268, 74185), (335, 59348), (370, 53734), (401, 49580), (670, 29674), (740, 26867), (802, 24790), (1340, 14837), (1604, 12395), (2005, 9916), (2479, 8020), (4010, 4958)]