31660280

素因数分解:

$2^3\times 5^1\times {\mathrm{347}}^1\times {\mathrm{2281}}^1$

素因数の和:2639

約数の個数: 32

約数和(自身を含む): 71472240

約数和(自身を除く): 39811960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 347, 694, 1388, 1735, 2281, 2776, 3470, 4562, 6940, 9124, 11405, 13880, 18248, 22810, 45620, 91240, 791507, 1583014, 3166028, 3957535, 6332056, 7915070, 15830140, 31660280]

約数ペア:

[(1, 31660280), (2, 15830140), (4, 7915070), (5, 6332056), (8, 3957535), (10, 3166028), (20, 1583014), (40, 791507), (347, 91240), (694, 45620), (1388, 22810), (1735, 18248), (2281, 13880), (2776, 11405), (3470, 9124), (4562, 6940)]