21192560

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2731}}^1$

素因数の和:2841

約数の個数: 40

約数和(自身を含む): 49798896

約数和(自身を除く): 28606336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2731, 3880, 5462, 7760, 10924, 13655, 21848, 27310, 43696, 54620, 109240, 218480, 264907, 529814, 1059628, 1324535, 2119256, 2649070, 4238512, 5298140, 10596280, 21192560]

約数ペア:

[(1, 21192560), (2, 10596280), (4, 5298140), (5, 4238512), (8, 2649070), (10, 2119256), (16, 1324535), (20, 1059628), (40, 529814), (80, 264907), (97, 218480), (194, 109240), (388, 54620), (485, 43696), (776, 27310), (970, 21848), (1552, 13655), (1940, 10924), (2731, 7760), (3880, 5462)]