19221215

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^2\times {\mathrm{43}}^1$

素因数の和:120

約数の個数: 36

約数和(自身を含む): 26716536

約数和(自身を除く): 7495321

約数列:

[1, 5, 13, 23, 43, 65, 115, 169, 215, 299, 529, 559, 845, 989, 1495, 2645, 2795, 3887, 4945, 6877, 7267, 12857, 19435, 22747, 34385, 36335, 64285, 89401, 113735, 167141, 295711, 447005, 835705, 1478555, 3844243, 19221215]

約数ペア:

[(1, 19221215), (5, 3844243), (13, 1478555), (23, 835705), (43, 447005), (65, 295711), (115, 167141), (169, 113735), (215, 89401), (299, 64285), (529, 36335), (559, 34385), (845, 22747), (989, 19435), (1495, 12857), (2645, 7267), (2795, 6877), (3887, 4945)]