28657231720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55110061}}^1$

素因数の和:55110085

約数の個数: 32

約数和(自身を含む): 69438678120

約数和(自身を除く): 40781446400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 55110061, 110220122, 220440244, 275550305, 440880488, 551100610, 716430793, 1102201220, 1432861586, 2204402440, 2865723172, 3582153965, 5731446344, 7164307930, 14328615860, 28657231720]

約数ペア:

[(1, 28657231720), (2, 14328615860), (4, 7164307930), (5, 5731446344), (8, 3582153965), (10, 2865723172), (13, 2204402440), (20, 1432861586), (26, 1102201220), (40, 716430793), (52, 551100610), (65, 440880488), (104, 275550305), (130, 220440244), (260, 110220122), (520, 55110061)]