21931075

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{887}}^1$

素因数の和:963

約数の個数: 24

約数和(自身を含む): 29069568

約数和(自身を除く): 7138493

約数列:

[1, 5, 23, 25, 43, 115, 215, 575, 887, 989, 1075, 4435, 4945, 20401, 22175, 24725, 38141, 102005, 190705, 510025, 877243, 953525, 4386215, 21931075]

約数ペア:

[(1, 21931075), (5, 4386215), (23, 953525), (25, 877243), (43, 510025), (115, 190705), (215, 102005), (575, 38141), (887, 24725), (989, 22175), (1075, 20401), (4435, 4945)]