820121225

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1319}}^1$

素因数の和:1383

約数の個数: 96

約数和(自身を含む): 1414195200

約数和(自身を除く): 594073975

約数列:

[1, 5, 7, 11, 17, 19, 25, 35, 55, 77, 85, 95, 119, 133, 175, 187, 209, 275, 323, 385, 425, 475, 595, 665, 935, 1045, 1309, 1319, 1463, 1615, 1925, 2261, 2975, 3325, 3553, 4675, 5225, 6545, 6595, 7315, 8075, 9233, 11305, 14509, 17765, 22423, 24871, 25061, 32725, 32975, 36575, 46165, 56525, 72545, 88825, 101563, 112115, 124355, 125305, 156961, 175427, 230825, 246653, 275671, 362725, 426037, 507815, 560575, 621775, 626525, 784805, 877135, 1233265, 1378355, 1726571, 1929697, 2130185, 2539075, 2982259, 3924025, 4385675, 4686407, 6166325, 6891775, 8632855, 9648485, 10650925, 14911295, 23432035, 32804849, 43164275, 48242425, 74556475, 117160175, 164024245, 820121225]

約数ペア:

[(1, 820121225), (5, 164024245), (7, 117160175), (11, 74556475), (17, 48242425), (19, 43164275), (25, 32804849), (35, 23432035), (55, 14911295), (77, 10650925), (85, 9648485), (95, 8632855), (119, 6891775), (133, 6166325), (175, 4686407), (187, 4385675), (209, 3924025), (275, 2982259), (323, 2539075), (385, 2130185), (425, 1929697), (475, 1726571), (595, 1378355), (665, 1233265), (935, 877135), (1045, 784805), (1309, 626525), (1319, 621775), (1463, 560575), (1615, 507815), (1925, 426037), (2261, 362725), (2975, 275671), (3325, 246653), (3553, 230825), (4675, 175427), (5225, 156961), (6545, 125305), (6595, 124355), (7315, 112115), (8075, 101563), (9233, 88825), (11305, 72545), (14509, 56525), (17765, 46165), (22423, 36575), (24871, 32975), (25061, 32725)]