18690644

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{353}}^1$

素因数の和:456

約数の個数: 48

約数和(自身を含む): 39330816

約数和(自身を除く): 20640172

約数列:

[1, 2, 4, 7, 14, 28, 31, 61, 62, 122, 124, 217, 244, 353, 427, 434, 706, 854, 868, 1412, 1708, 1891, 2471, 3782, 4942, 7564, 9884, 10943, 13237, 21533, 21886, 26474, 43066, 43772, 52948, 76601, 86132, 150731, 153202, 301462, 306404, 602924, 667523, 1335046, 2670092, 4672661, 9345322, 18690644]

約数ペア:

[(1, 18690644), (2, 9345322), (4, 4672661), (7, 2670092), (14, 1335046), (28, 667523), (31, 602924), (61, 306404), (62, 301462), (122, 153202), (124, 150731), (217, 86132), (244, 76601), (353, 52948), (427, 43772), (434, 43066), (706, 26474), (854, 21886), (868, 21533), (1412, 13237), (1708, 10943), (1891, 9884), (2471, 7564), (3782, 4942)]