17982020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{59}}^1\times {\mathrm{311}}^1$

素因数の和:393

約数の個数: 72

約数和(自身を含む): 44815680

約数和(自身を除く): 26833660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 59, 70, 98, 118, 140, 196, 236, 245, 295, 311, 413, 490, 590, 622, 826, 980, 1180, 1244, 1555, 1652, 2065, 2177, 2891, 3110, 4130, 4354, 5782, 6220, 8260, 8708, 10885, 11564, 14455, 15239, 18349, 21770, 28910, 30478, 36698, 43540, 57820, 60956, 73396, 76195, 91745, 128443, 152390, 183490, 256886, 304780, 366980, 513772, 642215, 899101, 1284430, 1798202, 2568860, 3596404, 4495505, 8991010, 17982020]

約数ペア:

[(1, 17982020), (2, 8991010), (4, 4495505), (5, 3596404), (7, 2568860), (10, 1798202), (14, 1284430), (20, 899101), (28, 642215), (35, 513772), (49, 366980), (59, 304780), (70, 256886), (98, 183490), (118, 152390), (140, 128443), (196, 91745), (236, 76195), (245, 73396), (295, 60956), (311, 57820), (413, 43540), (490, 36698), (590, 30478), (622, 28910), (826, 21770), (980, 18349), (1180, 15239), (1244, 14455), (1555, 11564), (1652, 10885), (2065, 8708), (2177, 8260), (2891, 6220), (3110, 5782), (4130, 4354)]