721000287

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1\times {\mathrm{1193}}^1$

素因数の和:1440

約数の個数: 48

約数和(自身を含む): 1220401728

約数和(自身を除く): 499401441

約数列:

[1, 3, 7, 9, 21, 53, 63, 159, 181, 371, 477, 543, 1113, 1193, 1267, 1629, 3339, 3579, 3801, 8351, 9593, 10737, 11403, 25053, 28779, 63229, 67151, 75159, 86337, 189687, 201453, 215933, 442603, 569061, 604359, 647799, 1327809, 1511531, 1943397, 3983427, 4534593, 11444449, 13603779, 34333347, 80111143, 103000041, 240333429, 721000287]

約数ペア:

[(1, 721000287), (3, 240333429), (7, 103000041), (9, 80111143), (21, 34333347), (53, 13603779), (63, 11444449), (159, 4534593), (181, 3983427), (371, 1943397), (477, 1511531), (543, 1327809), (1113, 647799), (1193, 604359), (1267, 569061), (1629, 442603), (3339, 215933), (3579, 201453), (3801, 189687), (8351, 86337), (9593, 75159), (10737, 67151), (11403, 63229), (25053, 28779)]