19802575

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:188

約数の個数: 36

約数和(自身を含む): 27457320

約数和(自身を除く): 7654745

約数列:

[1, 5, 13, 25, 43, 65, 109, 169, 215, 325, 545, 559, 845, 1075, 1417, 2725, 2795, 4225, 4687, 7085, 7267, 13975, 18421, 23435, 35425, 36335, 60931, 92105, 117175, 181675, 304655, 460525, 792103, 1523275, 3960515, 19802575]

約数ペア:

[(1, 19802575), (5, 3960515), (13, 1523275), (25, 792103), (43, 460525), (65, 304655), (109, 181675), (169, 117175), (215, 92105), (325, 60931), (545, 36335), (559, 35425), (845, 23435), (1075, 18421), (1417, 13975), (2725, 7267), (2795, 7085), (4225, 4687)]