21211900

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{4933}}^1$

素因数の和:4990

約数の個数: 36

約数和(自身を含む): 47109832

約数和(自身を除く): 25897932

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 215, 430, 860, 1075, 2150, 4300, 4933, 9866, 19732, 24665, 49330, 98660, 123325, 212119, 246650, 424238, 493300, 848476, 1060595, 2121190, 4242380, 5302975, 10605950, 21211900]

約数ペア:

[(1, 21211900), (2, 10605950), (4, 5302975), (5, 4242380), (10, 2121190), (20, 1060595), (25, 848476), (43, 493300), (50, 424238), (86, 246650), (100, 212119), (172, 123325), (215, 98660), (430, 49330), (860, 24665), (1075, 19732), (2150, 9866), (4300, 4933)]