21155745

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:186

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 18035295

約数列:

[1, 3, 5, 13, 15, 23, 39, 53, 65, 69, 89, 115, 159, 195, 265, 267, 299, 345, 445, 689, 795, 897, 1157, 1219, 1335, 1495, 2047, 2067, 3445, 3471, 3657, 4485, 4717, 5785, 6095, 6141, 10235, 10335, 14151, 15847, 17355, 18285, 23585, 26611, 30705, 47541, 61321, 70755, 79235, 79833, 108491, 133055, 183963, 237705, 306605, 325473, 399165, 542455, 919815, 1410383, 1627365, 4231149, 7051915, 21155745]

約数ペア:

[(1, 21155745), (3, 7051915), (5, 4231149), (13, 1627365), (15, 1410383), (23, 919815), (39, 542455), (53, 399165), (65, 325473), (69, 306605), (89, 237705), (115, 183963), (159, 133055), (195, 108491), (265, 79833), (267, 79235), (299, 70755), (345, 61321), (445, 47541), (689, 30705), (795, 26611), (897, 23585), (1157, 18285), (1219, 17355), (1335, 15847), (1495, 14151), (2047, 10335), (2067, 10235), (3445, 6141), (3471, 6095), (3657, 5785), (4485, 4717)]