81780325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 116992512

約数和(自身を除く): 35212187

約数列:

[1, 5, 11, 25, 31, 53, 55, 155, 181, 265, 275, 341, 583, 775, 905, 1325, 1643, 1705, 1991, 2915, 4525, 5611, 8215, 8525, 9593, 9955, 14575, 18073, 28055, 41075, 47965, 49775, 61721, 90365, 105523, 140275, 239825, 297383, 308605, 451825, 527615, 1486915, 1543025, 2638075, 3271213, 7434575, 16356065, 81780325]

約数ペア:

[(1, 81780325), (5, 16356065), (11, 7434575), (25, 3271213), (31, 2638075), (53, 1543025), (55, 1486915), (155, 527615), (181, 451825), (265, 308605), (275, 297383), (341, 239825), (583, 140275), (775, 105523), (905, 90365), (1325, 61721), (1643, 49775), (1705, 47965), (1991, 41075), (2915, 28055), (4525, 18073), (5611, 14575), (8215, 9955), (8525, 9593)]