19958900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1181}}^1$

素因数の和:1221

約数の個数: 54

約数和(自身を含む): 46938402

約数和(自身を除く): 26979502

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 169, 260, 325, 338, 650, 676, 845, 1181, 1300, 1690, 2362, 3380, 4225, 4724, 5905, 8450, 11810, 15353, 16900, 23620, 29525, 30706, 59050, 61412, 76765, 118100, 153530, 199589, 307060, 383825, 399178, 767650, 798356, 997945, 1535300, 1995890, 3991780, 4989725, 9979450, 19958900]

約数ペア:

[(1, 19958900), (2, 9979450), (4, 4989725), (5, 3991780), (10, 1995890), (13, 1535300), (20, 997945), (25, 798356), (26, 767650), (50, 399178), (52, 383825), (65, 307060), (100, 199589), (130, 153530), (169, 118100), (260, 76765), (325, 61412), (338, 59050), (650, 30706), (676, 29525), (845, 23620), (1181, 16900), (1300, 15353), (1690, 11810), (2362, 8450), (3380, 5905), (4225, 4724)]