19724705

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{563}}^1$

素因数の和:606

約数の個数: 48

約数和(自身を含む): 32405184

約数和(自身を除く): 12680479

約数列:

[1, 5, 7, 11, 13, 35, 49, 55, 65, 77, 91, 143, 245, 385, 455, 539, 563, 637, 715, 1001, 2695, 2815, 3185, 3941, 5005, 6193, 7007, 7319, 19705, 27587, 30965, 35035, 36595, 43351, 51233, 80509, 137935, 216755, 256165, 303457, 358631, 402545, 563563, 1517285, 1793155, 2817815, 3944941, 19724705]

約数ペア:

[(1, 19724705), (5, 3944941), (7, 2817815), (11, 1793155), (13, 1517285), (35, 563563), (49, 402545), (55, 358631), (65, 303457), (77, 256165), (91, 216755), (143, 137935), (245, 80509), (385, 51233), (455, 43351), (539, 36595), (563, 35035), (637, 30965), (715, 27587), (1001, 19705), (2695, 7319), (2815, 7007), (3185, 6193), (3941, 5005)]