28245217

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 40219200

約数和(自身を除く): 11973983

約数列:

[1, 7, 11, 13, 29, 49, 77, 91, 139, 143, 203, 319, 377, 539, 637, 973, 1001, 1421, 1529, 1807, 2233, 2639, 4031, 4147, 6811, 7007, 10703, 12649, 15631, 18473, 19877, 28217, 29029, 44341, 52403, 74921, 88543, 139139, 197519, 203203, 310387, 366821, 576433, 973973, 2172709, 2567747, 4035031, 28245217]

約数ペア:

[(1, 28245217), (7, 4035031), (11, 2567747), (13, 2172709), (29, 973973), (49, 576433), (77, 366821), (91, 310387), (139, 203203), (143, 197519), (203, 139139), (319, 88543), (377, 74921), (539, 52403), (637, 44341), (973, 29029), (1001, 28217), (1421, 19877), (1529, 18473), (1807, 15631), (2233, 12649), (2639, 10703), (4031, 7007), (4147, 6811)]