1640778760

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{577739}}^1$

素因数の和:577821

約数の個数: 32

約数和(自身を含む): 3743755200

約数和(自身を除く): 2102976440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 577739, 1155478, 2310956, 2888695, 4621912, 5777390, 11554780, 23109560, 41019469, 82038938, 164077876, 205097345, 328155752, 410194690, 820389380, 1640778760]

約数ペア:

[(1, 1640778760), (2, 820389380), (4, 410194690), (5, 328155752), (8, 205097345), (10, 164077876), (20, 82038938), (40, 41019469), (71, 23109560), (142, 11554780), (284, 5777390), (355, 4621912), (568, 2888695), (710, 2310956), (1420, 1155478), (2840, 577739)]