21495565

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{397}}^1$

素因数の和:446

約数の個数: 48

約数和(自身を含む): 34301232

約数和(自身を除く): 12805667

約数列:

[1, 5, 7, 13, 17, 35, 49, 65, 85, 91, 119, 221, 245, 397, 455, 595, 637, 833, 1105, 1547, 1985, 2779, 3185, 4165, 5161, 6749, 7735, 10829, 13895, 19453, 25805, 33745, 36127, 47243, 54145, 87737, 97265, 180635, 236215, 252889, 330701, 438685, 614159, 1264445, 1653505, 3070795, 4299113, 21495565]

約数ペア:

[(1, 21495565), (5, 4299113), (7, 3070795), (13, 1653505), (17, 1264445), (35, 614159), (49, 438685), (65, 330701), (85, 252889), (91, 236215), (119, 180635), (221, 97265), (245, 87737), (397, 54145), (455, 47243), (595, 36127), (637, 33745), (833, 25805), (1105, 19453), (1547, 13895), (1985, 10829), (2779, 7735), (3185, 6749), (4165, 5161)]