21557648

素因数分解:

$2^4\times 7^2\times {\mathrm{31}}^1\times {\mathrm{887}}^1$

素因数の和:940

約数の個数: 60

約数和(自身を含む): 50211072

約数和(自身を除く): 28653424

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 49, 56, 62, 98, 112, 124, 196, 217, 248, 392, 434, 496, 784, 868, 887, 1519, 1736, 1774, 3038, 3472, 3548, 6076, 6209, 7096, 12152, 12418, 14192, 24304, 24836, 27497, 43463, 49672, 54994, 86926, 99344, 109988, 173852, 192479, 219976, 347704, 384958, 439952, 695408, 769916, 1347353, 1539832, 2694706, 3079664, 5389412, 10778824, 21557648]

約数ペア:

[(1, 21557648), (2, 10778824), (4, 5389412), (7, 3079664), (8, 2694706), (14, 1539832), (16, 1347353), (28, 769916), (31, 695408), (49, 439952), (56, 384958), (62, 347704), (98, 219976), (112, 192479), (124, 173852), (196, 109988), (217, 99344), (248, 86926), (392, 54994), (434, 49672), (496, 43463), (784, 27497), (868, 24836), (887, 24304), (1519, 14192), (1736, 12418), (1774, 12152), (3038, 7096), (3472, 6209), (3548, 6076)]