21885580

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17939}}^1$

素因数の和:18009

約数の個数: 24

約数和(自身を含む): 46715760

約数和(自身を除く): 24830180

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17939, 35878, 71756, 89695, 179390, 358780, 1094279, 2188558, 4377116, 5471395, 10942790, 21885580]

約数ペア:

[(1, 21885580), (2, 10942790), (4, 5471395), (5, 4377116), (10, 2188558), (20, 1094279), (61, 358780), (122, 179390), (244, 89695), (305, 71756), (610, 35878), (1220, 17939)]