81745965

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{131}}^1\times {\mathrm{283}}^1$

素因数の和:439

約数の個数: 72

約数和(自身を含む): 166671648

約数和(自身を除く): 84925683

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 131, 147, 245, 283, 315, 393, 441, 655, 735, 849, 917, 1179, 1415, 1965, 1981, 2205, 2547, 2751, 4245, 4585, 5895, 5943, 6419, 8253, 9905, 12735, 13755, 13867, 17829, 19257, 29715, 32095, 37073, 41265, 41601, 57771, 69335, 89145, 96285, 111219, 124803, 185365, 208005, 259511, 288855, 333657, 556095, 624015, 778533, 1297555, 1668285, 1816577, 2335599, 3892665, 5449731, 9082885, 11677995, 16349193, 27248655, 81745965]

約数ペア:

[(1, 81745965), (3, 27248655), (5, 16349193), (7, 11677995), (9, 9082885), (15, 5449731), (21, 3892665), (35, 2335599), (45, 1816577), (49, 1668285), (63, 1297555), (105, 778533), (131, 624015), (147, 556095), (245, 333657), (283, 288855), (315, 259511), (393, 208005), (441, 185365), (655, 124803), (735, 111219), (849, 96285), (917, 89145), (1179, 69335), (1415, 57771), (1965, 41601), (1981, 41265), (2205, 37073), (2547, 32095), (2751, 29715), (4245, 19257), (4585, 17829), (5895, 13867), (5943, 13755), (6419, 12735), (8253, 9905)]