21519952

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1009}}^1$

素因数の和:1091

約数の個数: 40

約数和(自身を含む): 44084480

約数和(自身を除く): 22564528

約数列:

[1, 2, 4, 8, 16, 31, 43, 62, 86, 124, 172, 248, 344, 496, 688, 1009, 1333, 2018, 2666, 4036, 5332, 8072, 10664, 16144, 21328, 31279, 43387, 62558, 86774, 125116, 173548, 250232, 347096, 500464, 694192, 1344997, 2689994, 5379988, 10759976, 21519952]

約数ペア:

[(1, 21519952), (2, 10759976), (4, 5379988), (8, 2689994), (16, 1344997), (31, 694192), (43, 500464), (62, 347096), (86, 250232), (124, 173548), (172, 125116), (248, 86774), (344, 62558), (496, 43387), (688, 31279), (1009, 21328), (1333, 16144), (2018, 10664), (2666, 8072), (4036, 5332)]