78403640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{280013}}^1$

素因数の和:280031

約数の個数: 32

約数和(自身を含む): 201610080

約数和(自身を除く): 123206440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 280013, 560026, 1120052, 1400065, 1960091, 2240104, 2800130, 3920182, 5600260, 7840364, 9800455, 11200520, 15680728, 19600910, 39201820, 78403640]

約数ペア:

[(1, 78403640), (2, 39201820), (4, 19600910), (5, 15680728), (7, 11200520), (8, 9800455), (10, 7840364), (14, 5600260), (20, 3920182), (28, 2800130), (35, 2240104), (40, 1960091), (56, 1400065), (70, 1120052), (140, 560026), (280, 280013)]