21545205

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7681}}^1$

素因数の和:7717

約数の個数: 32

約数和(自身を含む): 39823488

約数和(自身を除く): 18278283

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7681, 23043, 38405, 84491, 115215, 130577, 253473, 391731, 422455, 652885, 1267365, 1436347, 1958655, 4309041, 7181735, 21545205]

約数ペア:

[(1, 21545205), (3, 7181735), (5, 4309041), (11, 1958655), (15, 1436347), (17, 1267365), (33, 652885), (51, 422455), (55, 391731), (85, 253473), (165, 130577), (187, 115215), (255, 84491), (561, 38405), (935, 23043), (2805, 7681)]