399936280

素因数分解:

$2^3\times 5^1\times {\mathrm{1033}}^1\times {\mathrm{9679}}^1$

素因数の和:10723

約数の個数: 32

約数和(自身を含む): 900820800

約数和(自身を除く): 500884520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1033, 2066, 4132, 5165, 8264, 9679, 10330, 19358, 20660, 38716, 41320, 48395, 77432, 96790, 193580, 387160, 9998407, 19996814, 39993628, 49992035, 79987256, 99984070, 199968140, 399936280]

約数ペア:

[(1, 399936280), (2, 199968140), (4, 99984070), (5, 79987256), (8, 49992035), (10, 39993628), (20, 19996814), (40, 9998407), (1033, 387160), (2066, 193580), (4132, 96790), (5165, 77432), (8264, 48395), (9679, 41320), (10330, 38716), (19358, 20660)]