20639025

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{269}}^1$

素因数の和:327

約数の個数: 72

約数和(自身を含む): 41783040

約数和(自身を除く): 21144015

約数列:

[1, 3, 5, 9, 11, 15, 25, 31, 33, 45, 55, 75, 93, 99, 155, 165, 225, 269, 275, 279, 341, 465, 495, 775, 807, 825, 1023, 1345, 1395, 1705, 2325, 2421, 2475, 2959, 3069, 4035, 5115, 6725, 6975, 8339, 8525, 8877, 12105, 14795, 15345, 20175, 25017, 25575, 26631, 41695, 44385, 60525, 73975, 75051, 76725, 91729, 125085, 133155, 208475, 221925, 275187, 375255, 458645, 625425, 665775, 825561, 1375935, 1876275, 2293225, 4127805, 6879675, 20639025]

約数ペア:

[(1, 20639025), (3, 6879675), (5, 4127805), (9, 2293225), (11, 1876275), (15, 1375935), (25, 825561), (31, 665775), (33, 625425), (45, 458645), (55, 375255), (75, 275187), (93, 221925), (99, 208475), (155, 133155), (165, 125085), (225, 91729), (269, 76725), (275, 75051), (279, 73975), (341, 60525), (465, 44385), (495, 41695), (775, 26631), (807, 25575), (825, 25017), (1023, 20175), (1345, 15345), (1395, 14795), (1705, 12105), (2325, 8877), (2421, 8525), (2475, 8339), (2959, 6975), (3069, 6725), (4035, 5115)]