20138965

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{181}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 32183424

約数和(自身を除く): 12044459

約数列:

[1, 5, 7, 11, 17, 35, 55, 77, 85, 119, 181, 187, 289, 385, 595, 905, 935, 1267, 1309, 1445, 1991, 2023, 3077, 3179, 6335, 6545, 9955, 10115, 13937, 15385, 15895, 21539, 22253, 33847, 52309, 69685, 107695, 111265, 169235, 236929, 261545, 366163, 575399, 1184645, 1830815, 2876995, 4027793, 20138965]

約数ペア:

[(1, 20138965), (5, 4027793), (7, 2876995), (11, 1830815), (17, 1184645), (35, 575399), (55, 366163), (77, 261545), (85, 236929), (119, 169235), (181, 111265), (187, 107695), (289, 69685), (385, 52309), (595, 33847), (905, 22253), (935, 21539), (1267, 15895), (1309, 15385), (1445, 13937), (1991, 10115), (2023, 9955), (3077, 6545), (3179, 6335)]