261396795

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 472531968

約数和(自身を除く): 211135173

約数列:

[1, 3, 5, 11, 15, 33, 53, 55, 71, 159, 165, 213, 265, 355, 421, 583, 781, 795, 1065, 1263, 1749, 2105, 2343, 2915, 3763, 3905, 4631, 6315, 8745, 11289, 11715, 13893, 18815, 22313, 23155, 29891, 41393, 56445, 66939, 69465, 89673, 111565, 124179, 149455, 206965, 245443, 328801, 334695, 448365, 620895, 736329, 986403, 1227215, 1584223, 1644005, 3681645, 4752669, 4932015, 7921115, 17426453, 23763345, 52279359, 87132265, 261396795]

約数ペア:

[(1, 261396795), (3, 87132265), (5, 52279359), (11, 23763345), (15, 17426453), (33, 7921115), (53, 4932015), (55, 4752669), (71, 3681645), (159, 1644005), (165, 1584223), (213, 1227215), (265, 986403), (355, 736329), (421, 620895), (583, 448365), (781, 334695), (795, 328801), (1065, 245443), (1263, 206965), (1749, 149455), (2105, 124179), (2343, 111565), (2915, 89673), (3763, 69465), (3905, 66939), (4631, 56445), (6315, 41393), (8745, 29891), (11289, 23155), (11715, 22313), (13893, 18815)]