21118641

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 31363200

約数和(自身を除く): 10244559

約数列:

[1, 3, 17, 29, 51, 87, 109, 131, 327, 393, 493, 1479, 1853, 2227, 3161, 3799, 5559, 6681, 9483, 11397, 14279, 42837, 53737, 64583, 161211, 193749, 242743, 414091, 728229, 1242273, 7039547, 21118641]

約数ペア:

[(1, 21118641), (3, 7039547), (17, 1242273), (29, 728229), (51, 414091), (87, 242743), (109, 193749), (131, 161211), (327, 64583), (393, 53737), (493, 42837), (1479, 14279), (1853, 11397), (2227, 9483), (3161, 6681), (3799, 5559)]