21158864

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1471}}^1$

素因数の和:1539

約数の個数: 40

約数和(自身を含む): 43806720

約数和(自身を除く): 22647856

約数列:

[1, 2, 4, 8, 16, 29, 31, 58, 62, 116, 124, 232, 248, 464, 496, 899, 1471, 1798, 2942, 3596, 5884, 7192, 11768, 14384, 23536, 42659, 45601, 85318, 91202, 170636, 182404, 341272, 364808, 682544, 729616, 1322429, 2644858, 5289716, 10579432, 21158864]

約数ペア:

[(1, 21158864), (2, 10579432), (4, 5289716), (8, 2644858), (16, 1322429), (29, 729616), (31, 682544), (58, 364808), (62, 341272), (116, 182404), (124, 170636), (232, 91202), (248, 85318), (464, 45601), (496, 42659), (899, 23536), (1471, 14384), (1798, 11768), (2942, 7192), (3596, 5884)]