21281516

素因数分解:

$2^2\times {\mathrm{113}}^1\times {\mathrm{197}}^1\times {\mathrm{239}}^1$

素因数の和:553

約数の個数: 24

約数和(自身を含む): 37920960

約数和(自身を除く): 16639444

約数列:

[1, 2, 4, 113, 197, 226, 239, 394, 452, 478, 788, 956, 22261, 27007, 44522, 47083, 54014, 89044, 94166, 108028, 188332, 5320379, 10640758, 21281516]

約数ペア:

[(1, 21281516), (2, 10640758), (4, 5320379), (113, 188332), (197, 108028), (226, 94166), (239, 89044), (394, 54014), (452, 47083), (478, 44522), (788, 27007), (956, 22261)]