21839420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{241}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 48299328

約数和(自身を除く): 26459908

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 197, 230, 241, 394, 460, 482, 788, 964, 985, 1205, 1970, 2410, 3940, 4531, 4820, 5543, 9062, 11086, 18124, 22172, 22655, 27715, 45310, 47477, 55430, 90620, 94954, 110860, 189908, 237385, 474770, 949540, 1091971, 2183942, 4367884, 5459855, 10919710, 21839420]

約数ペア:

[(1, 21839420), (2, 10919710), (4, 5459855), (5, 4367884), (10, 2183942), (20, 1091971), (23, 949540), (46, 474770), (92, 237385), (115, 189908), (197, 110860), (230, 94954), (241, 90620), (394, 55430), (460, 47477), (482, 45310), (788, 27715), (964, 22655), (985, 22172), (1205, 18124), (1970, 11086), (2410, 9062), (3940, 5543), (4531, 4820)]