1284286720

素因数分解:

$2^8\times 5^1\times {\mathrm{1003349}}^1$

素因数の和:1003370

約数の個数: 36

約数和(自身を含む): 3076271100

約数和(自身を除く): 1791984380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 1003349, 2006698, 4013396, 5016745, 8026792, 10033490, 16053584, 20066980, 32107168, 40133960, 64214336, 80267920, 128428672, 160535840, 256857344, 321071680, 642143360, 1284286720]

約数ペア:

[(1, 1284286720), (2, 642143360), (4, 321071680), (5, 256857344), (8, 160535840), (10, 128428672), (16, 80267920), (20, 64214336), (32, 40133960), (40, 32107168), (64, 20066980), (80, 16053584), (128, 10033490), (160, 8026792), (256, 5016745), (320, 4013396), (640, 2006698), (1280, 1003349)]