19947278320

素因数分解:

$2^4\times 5^1\times {\mathrm{249340979}}^1$

素因数の和:249340992

約数の個数: 20

約数和(自身を含む): 46377422280

約数和(自身を除く): 26430143960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249340979, 498681958, 997363916, 1246704895, 1994727832, 2493409790, 3989455664, 4986819580, 9973639160, 19947278320]

約数ペア:

[(1, 19947278320), (2, 9973639160), (4, 4986819580), (5, 3989455664), (8, 2493409790), (10, 1994727832), (16, 1246704895), (20, 997363916), (40, 498681958), (80, 249340979)]