21330260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{1009}}^1$

素因数の和:1176

約数の個数: 48

約数和(自身を含む): 51582720

約数和(自身を除く): 30252460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151, 302, 604, 755, 1009, 1057, 1510, 2018, 2114, 3020, 4036, 4228, 5045, 5285, 7063, 10090, 10570, 14126, 20180, 21140, 28252, 35315, 70630, 141260, 152359, 304718, 609436, 761795, 1066513, 1523590, 2133026, 3047180, 4266052, 5332565, 10665130, 21330260]

約数ペア:

[(1, 21330260), (2, 10665130), (4, 5332565), (5, 4266052), (7, 3047180), (10, 2133026), (14, 1523590), (20, 1066513), (28, 761795), (35, 609436), (70, 304718), (140, 152359), (151, 141260), (302, 70630), (604, 35315), (755, 28252), (1009, 21140), (1057, 20180), (1510, 14126), (2018, 10570), (2114, 10090), (3020, 7063), (4036, 5285), (4228, 5045)]