19780605

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^2$

素因数の和:77

約数の個数: 90

約数和(自身を含む): 40787406

約数和(自身を除く): 21006801

約数列:

[1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 65, 81, 85, 117, 135, 153, 169, 195, 221, 255, 289, 351, 405, 459, 507, 585, 663, 765, 845, 867, 1053, 1105, 1377, 1445, 1521, 1755, 1989, 2295, 2535, 2601, 2873, 3315, 3757, 4335, 4563, 5265, 5967, 6885, 7605, 7803, 8619, 9945, 11271, 13005, 13689, 14365, 17901, 18785, 22815, 23409, 25857, 29835, 33813, 39015, 43095, 48841, 56355, 68445, 77571, 89505, 101439, 117045, 129285, 146523, 169065, 232713, 244205, 304317, 387855, 439569, 507195, 732615, 1163565, 1318707, 1521585, 2197845, 3956121, 6593535, 19780605]

約数ペア:

[(1, 19780605), (3, 6593535), (5, 3956121), (9, 2197845), (13, 1521585), (15, 1318707), (17, 1163565), (27, 732615), (39, 507195), (45, 439569), (51, 387855), (65, 304317), (81, 244205), (85, 232713), (117, 169065), (135, 146523), (153, 129285), (169, 117045), (195, 101439), (221, 89505), (255, 77571), (289, 68445), (351, 56355), (405, 48841), (459, 43095), (507, 39015), (585, 33813), (663, 29835), (765, 25857), (845, 23409), (867, 22815), (1053, 18785), (1105, 17901), (1377, 14365), (1445, 13689), (1521, 13005), (1755, 11271), (1989, 9945), (2295, 8619), (2535, 7803), (2601, 7605), (2873, 6885), (3315, 5967), (3757, 5265), (4335, 4563)]