21861640

素因数分解:

$2^3\times 5^1\times {\mathrm{383}}^1\times {\mathrm{1427}}^1$

素因数の和:1821

約数の個数: 32

約数和(自身を含む): 49351680

約数和(自身を除く): 27490040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 383, 766, 1427, 1532, 1915, 2854, 3064, 3830, 5708, 7135, 7660, 11416, 14270, 15320, 28540, 57080, 546541, 1093082, 2186164, 2732705, 4372328, 5465410, 10930820, 21861640]

約数ペア:

[(1, 21861640), (2, 10930820), (4, 5465410), (5, 4372328), (8, 2732705), (10, 2186164), (20, 1093082), (40, 546541), (383, 57080), (766, 28540), (1427, 15320), (1532, 14270), (1915, 11416), (2854, 7660), (3064, 7135), (3830, 5708)]