21777940

素因数分解:

$2^2\times 5^1\times {\mathrm{571}}^1\times {\mathrm{1907}}^1$

素因数の和:2487

約数の個数: 24

約数和(自身を含む): 45837792

約数和(自身を除く): 24059852

約数列:

[1, 2, 4, 5, 10, 20, 571, 1142, 1907, 2284, 2855, 3814, 5710, 7628, 9535, 11420, 19070, 38140, 1088897, 2177794, 4355588, 5444485, 10888970, 21777940]

約数ペア:

[(1, 21777940), (2, 10888970), (4, 5444485), (5, 4355588), (10, 2177794), (20, 1088897), (571, 38140), (1142, 19070), (1907, 11420), (2284, 9535), (2855, 7628), (3814, 5710)]