19881407

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{59}}^1$

素因数の和:132

約数の個数: 36

約数和(自身を含む): 26477640

約数和(自身を除く): 6596233

約数列:

[1, 7, 13, 23, 49, 59, 91, 161, 299, 413, 529, 637, 767, 1127, 1357, 2093, 2891, 3703, 5369, 6877, 9499, 14651, 17641, 25921, 31211, 37583, 48139, 66493, 123487, 218477, 336973, 405743, 864409, 1529339, 2840201, 19881407]

約数ペア:

[(1, 19881407), (7, 2840201), (13, 1529339), (23, 864409), (49, 405743), (59, 336973), (91, 218477), (161, 123487), (299, 66493), (413, 48139), (529, 37583), (637, 31211), (767, 25921), (1127, 17641), (1357, 14651), (2093, 9499), (2891, 6877), (3703, 5369)]