21270944

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:729

約数の個数: 48

約数和(自身を含む): 45137736

約数和(自身を除く): 23866792

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 61, 68, 122, 136, 244, 272, 488, 544, 641, 976, 1037, 1282, 1952, 2074, 2564, 4148, 5128, 8296, 10256, 10897, 16592, 20512, 21794, 33184, 39101, 43588, 78202, 87176, 156404, 174352, 312808, 348704, 625616, 664717, 1251232, 1329434, 2658868, 5317736, 10635472, 21270944]

約数ペア:

[(1, 21270944), (2, 10635472), (4, 5317736), (8, 2658868), (16, 1329434), (17, 1251232), (32, 664717), (34, 625616), (61, 348704), (68, 312808), (122, 174352), (136, 156404), (244, 87176), (272, 78202), (488, 43588), (544, 39101), (641, 33184), (976, 21794), (1037, 20512), (1282, 16592), (1952, 10897), (2074, 10256), (2564, 8296), (4148, 5128)]