780760

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 1782000

約数和(自身を除く): 1001240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 149, 262, 298, 524, 596, 655, 745, 1048, 1192, 1310, 1490, 2620, 2980, 5240, 5960, 19519, 39038, 78076, 97595, 156152, 195190, 390380, 780760]

約数ペア:

[(1, 780760), (2, 390380), (4, 195190), (5, 156152), (8, 97595), (10, 78076), (20, 39038), (40, 19519), (131, 5960), (149, 5240), (262, 2980), (298, 2620), (524, 1490), (596, 1310), (655, 1192), (745, 1048)]