20178675

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:321

約数の個数: 72

約数和(自身を含む): 40854528

約数和(自身を除く): 20675853

約数列:

[1, 3, 5, 9, 11, 15, 25, 31, 33, 45, 55, 75, 93, 99, 155, 165, 225, 263, 275, 279, 341, 465, 495, 775, 789, 825, 1023, 1315, 1395, 1705, 2325, 2367, 2475, 2893, 3069, 3945, 5115, 6575, 6975, 8153, 8525, 8679, 11835, 14465, 15345, 19725, 24459, 25575, 26037, 40765, 43395, 59175, 72325, 73377, 76725, 89683, 122295, 130185, 203825, 216975, 269049, 366885, 448415, 611475, 650925, 807147, 1345245, 1834425, 2242075, 4035735, 6726225, 20178675]

約数ペア:

[(1, 20178675), (3, 6726225), (5, 4035735), (9, 2242075), (11, 1834425), (15, 1345245), (25, 807147), (31, 650925), (33, 611475), (45, 448415), (55, 366885), (75, 269049), (93, 216975), (99, 203825), (155, 130185), (165, 122295), (225, 89683), (263, 76725), (275, 73377), (279, 72325), (341, 59175), (465, 43395), (495, 40765), (775, 26037), (789, 25575), (825, 24459), (1023, 19725), (1315, 15345), (1395, 14465), (1705, 11835), (2325, 8679), (2367, 8525), (2475, 8153), (2893, 6975), (3069, 6575), (3945, 5115)]