21245835

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^2\times {\mathrm{29}}^1$

素因数の和:97

約数の個数: 72

約数和(自身を含む): 40450320

約数和(自身を除く): 19204485

約数列:

[1, 3, 5, 13, 15, 17, 29, 39, 51, 65, 85, 87, 145, 169, 195, 221, 255, 289, 377, 435, 493, 507, 663, 845, 867, 1105, 1131, 1445, 1479, 1885, 2465, 2535, 2873, 3315, 3757, 4335, 4901, 5655, 6409, 7395, 8381, 8619, 11271, 14365, 14703, 18785, 19227, 24505, 25143, 32045, 41905, 43095, 48841, 56355, 73515, 83317, 96135, 108953, 125715, 146523, 244205, 249951, 326859, 416585, 544765, 732615, 1249755, 1416389, 1634295, 4249167, 7081945, 21245835]

約数ペア:

[(1, 21245835), (3, 7081945), (5, 4249167), (13, 1634295), (15, 1416389), (17, 1249755), (29, 732615), (39, 544765), (51, 416585), (65, 326859), (85, 249951), (87, 244205), (145, 146523), (169, 125715), (195, 108953), (221, 96135), (255, 83317), (289, 73515), (377, 56355), (435, 48841), (493, 43095), (507, 41905), (663, 32045), (845, 25143), (867, 24505), (1105, 19227), (1131, 18785), (1445, 14703), (1479, 14365), (1885, 11271), (2465, 8619), (2535, 8381), (2873, 7395), (3315, 6409), (3757, 5655), (4335, 4901)]