661445420

素因数分解:

$2^2\times 5^1\times {\mathrm{1249}}^1\times {\mathrm{26479}}^1$

素因数の和:27737

約数の個数: 24

約数和(自身を含む): 1390200000

約数和(自身を除く): 728754580

約数列:

[1, 2, 4, 5, 10, 20, 1249, 2498, 4996, 6245, 12490, 24980, 26479, 52958, 105916, 132395, 264790, 529580, 33072271, 66144542, 132289084, 165361355, 330722710, 661445420]

約数ペア:

[(1, 661445420), (2, 330722710), (4, 165361355), (5, 132289084), (10, 66144542), (20, 33072271), (1249, 529580), (2498, 264790), (4996, 132395), (6245, 105916), (12490, 52958), (24980, 26479)]