421809025

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1$

素因数の和:271

約数の個数: 72

約数和(自身を含む): 623397600

約数和(自身を除く): 201588575

約数列:

[1, 5, 11, 19, 25, 41, 55, 95, 121, 179, 205, 209, 275, 451, 475, 605, 779, 895, 1025, 1045, 1969, 2255, 2299, 3025, 3401, 3895, 4475, 4961, 5225, 7339, 8569, 9845, 11275, 11495, 17005, 19475, 21659, 24805, 36695, 37411, 42845, 49225, 57475, 80729, 85025, 94259, 108295, 124025, 139441, 183475, 187055, 214225, 403645, 411521, 471295, 541475, 697205, 888019, 935275, 1533851, 2018225, 2057605, 2356475, 3486025, 4440095, 7669255, 10288025, 16872361, 22200475, 38346275, 84361805, 421809025]

約数ペア:

[(1, 421809025), (5, 84361805), (11, 38346275), (19, 22200475), (25, 16872361), (41, 10288025), (55, 7669255), (95, 4440095), (121, 3486025), (179, 2356475), (205, 2057605), (209, 2018225), (275, 1533851), (451, 935275), (475, 888019), (605, 697205), (779, 541475), (895, 471295), (1025, 411521), (1045, 403645), (1969, 214225), (2255, 187055), (2299, 183475), (3025, 139441), (3401, 124025), (3895, 108295), (4475, 94259), (4961, 85025), (5225, 80729), (7339, 57475), (8569, 49225), (9845, 42845), (11275, 37411), (11495, 36695), (17005, 24805), (19475, 21659)]