28781775

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{401}}^1$

素因数の和:457

約数の個数: 72

約数和(自身を含む): 58322160

約数和(自身を除く): 29540385

約数列:

[1, 3, 5, 9, 11, 15, 25, 29, 33, 45, 55, 75, 87, 99, 145, 165, 225, 261, 275, 319, 401, 435, 495, 725, 825, 957, 1203, 1305, 1595, 2005, 2175, 2475, 2871, 3609, 4411, 4785, 6015, 6525, 7975, 10025, 11629, 13233, 14355, 18045, 22055, 23925, 30075, 34887, 39699, 58145, 66165, 71775, 90225, 104661, 110275, 127919, 174435, 198495, 290725, 330825, 383757, 523305, 639595, 872175, 992475, 1151271, 1918785, 2616525, 3197975, 5756355, 9593925, 28781775]

約数ペア:

[(1, 28781775), (3, 9593925), (5, 5756355), (9, 3197975), (11, 2616525), (15, 1918785), (25, 1151271), (29, 992475), (33, 872175), (45, 639595), (55, 523305), (75, 383757), (87, 330825), (99, 290725), (145, 198495), (165, 174435), (225, 127919), (261, 110275), (275, 104661), (319, 90225), (401, 71775), (435, 66165), (495, 58145), (725, 39699), (825, 34887), (957, 30075), (1203, 23925), (1305, 22055), (1595, 18045), (2005, 14355), (2175, 13233), (2475, 11629), (2871, 10025), (3609, 7975), (4411, 6525), (4785, 6015)]