20453220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{571}}^1$

素因数の和:785

約数の個数: 72

約数和(自身を含む): 62462400

約数和(自身を除く): 42009180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 199, 398, 571, 597, 796, 995, 1142, 1194, 1713, 1791, 1990, 2284, 2388, 2855, 2985, 3426, 3582, 3980, 5139, 5710, 5970, 6852, 7164, 8565, 8955, 10278, 11420, 11940, 17130, 17910, 20556, 25695, 34260, 35820, 51390, 102780, 113629, 227258, 340887, 454516, 568145, 681774, 1022661, 1136290, 1363548, 1704435, 2045322, 2272580, 3408870, 4090644, 5113305, 6817740, 10226610, 20453220]

約数ペア:

[(1, 20453220), (2, 10226610), (3, 6817740), (4, 5113305), (5, 4090644), (6, 3408870), (9, 2272580), (10, 2045322), (12, 1704435), (15, 1363548), (18, 1136290), (20, 1022661), (30, 681774), (36, 568145), (45, 454516), (60, 340887), (90, 227258), (180, 113629), (199, 102780), (398, 51390), (571, 35820), (597, 34260), (796, 25695), (995, 20556), (1142, 17910), (1194, 17130), (1713, 11940), (1791, 11420), (1990, 10278), (2284, 8955), (2388, 8565), (2855, 7164), (2985, 6852), (3426, 5970), (3582, 5710), (3980, 5139)]