19908850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{281}}^1$

素因数の和:415

約数の個数: 48

約数和(自身を含む): 40388040

約数和(自身を除く): 20479190

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 109, 130, 218, 281, 325, 545, 562, 650, 1090, 1405, 1417, 2725, 2810, 2834, 3653, 5450, 7025, 7085, 7306, 14050, 14170, 18265, 30629, 35425, 36530, 61258, 70850, 91325, 153145, 182650, 306290, 398177, 765725, 796354, 1531450, 1990885, 3981770, 9954425, 19908850]

約数ペア:

[(1, 19908850), (2, 9954425), (5, 3981770), (10, 1990885), (13, 1531450), (25, 796354), (26, 765725), (50, 398177), (65, 306290), (109, 182650), (130, 153145), (218, 91325), (281, 70850), (325, 61258), (545, 36530), (562, 35425), (650, 30629), (1090, 18265), (1405, 14170), (1417, 14050), (2725, 7306), (2810, 7085), (2834, 7025), (3653, 5450)]