21136048

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{991}}^1$

素因数の和:1073

約数の個数: 40

約数和(自身を含む): 43298816

約数和(自身を除く): 22162768

約数列:

[1, 2, 4, 8, 16, 31, 43, 62, 86, 124, 172, 248, 344, 496, 688, 991, 1333, 1982, 2666, 3964, 5332, 7928, 10664, 15856, 21328, 30721, 42613, 61442, 85226, 122884, 170452, 245768, 340904, 491536, 681808, 1321003, 2642006, 5284012, 10568024, 21136048]

約数ペア:

[(1, 21136048), (2, 10568024), (4, 5284012), (8, 2642006), (16, 1321003), (31, 681808), (43, 491536), (62, 340904), (86, 245768), (124, 170452), (172, 122884), (248, 85226), (344, 61442), (496, 42613), (688, 30721), (991, 21328), (1333, 15856), (1982, 10664), (2666, 7928), (3964, 5332)]