31801720

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{10891}}^1$

素因数の和:10975

約数の個数: 32

約数和(自身を含む): 72540720

約数和(自身を除く): 40739000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 10891, 21782, 43564, 54455, 87128, 108910, 217820, 435640, 795043, 1590086, 3180172, 3975215, 6360344, 7950430, 15900860, 31801720]

約数ペア:

[(1, 31801720), (2, 15900860), (4, 7950430), (5, 6360344), (8, 3975215), (10, 3180172), (20, 1590086), (40, 795043), (73, 435640), (146, 217820), (292, 108910), (365, 87128), (584, 54455), (730, 43564), (1460, 21782), (2920, 10891)]