19051220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{409}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 42774480

約数和(自身を除く): 23723260

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 137, 170, 274, 340, 409, 548, 685, 818, 1370, 1636, 2045, 2329, 2740, 4090, 4658, 6953, 8180, 9316, 11645, 13906, 23290, 27812, 34765, 46580, 56033, 69530, 112066, 139060, 224132, 280165, 560330, 952561, 1120660, 1905122, 3810244, 4762805, 9525610, 19051220]

約数ペア:

[(1, 19051220), (2, 9525610), (4, 4762805), (5, 3810244), (10, 1905122), (17, 1120660), (20, 952561), (34, 560330), (68, 280165), (85, 224132), (137, 139060), (170, 112066), (274, 69530), (340, 56033), (409, 46580), (548, 34765), (685, 27812), (818, 23290), (1370, 13906), (1636, 11645), (2045, 9316), (2329, 8180), (2740, 6953), (4090, 4658)]