21963580

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13901}}^1$

素因数の和:13989

約数の個数: 24

約数和(自身を含む): 46710720

約数和(自身を除く): 24747140

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13901, 27802, 55604, 69505, 139010, 278020, 1098179, 2196358, 4392716, 5490895, 10981790, 21963580]

約数ペア:

[(1, 21963580), (2, 10981790), (4, 5490895), (5, 4392716), (10, 2196358), (20, 1098179), (79, 278020), (158, 139010), (316, 69505), (395, 55604), (790, 27802), (1580, 13901)]