21361712

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{509}}^1$

素因数の和:621

約数の個数: 40

約数和(自身を含む): 43129680

約数和(自身を除く): 21767968

約数列:

[1, 2, 4, 8, 16, 43, 61, 86, 122, 172, 244, 344, 488, 509, 688, 976, 1018, 2036, 2623, 4072, 5246, 8144, 10492, 20984, 21887, 31049, 41968, 43774, 62098, 87548, 124196, 175096, 248392, 350192, 496784, 1335107, 2670214, 5340428, 10680856, 21361712]

約数ペア:

[(1, 21361712), (2, 10680856), (4, 5340428), (8, 2670214), (16, 1335107), (43, 496784), (61, 350192), (86, 248392), (122, 175096), (172, 124196), (244, 87548), (344, 62098), (488, 43774), (509, 41968), (688, 31049), (976, 21887), (1018, 20984), (2036, 10492), (2623, 8144), (4072, 5246)]