20856164

素因数分解:

$2^2\times 7^2\times {\mathrm{97}}^1\times {\mathrm{1097}}^1$

素因数の和:1212

約数の個数: 36

約数和(自身を含む): 42933996

約数和(自身を除く): 22077832

約数列:

[1, 2, 4, 7, 14, 28, 49, 97, 98, 194, 196, 388, 679, 1097, 1358, 2194, 2716, 4388, 4753, 7679, 9506, 15358, 19012, 30716, 53753, 106409, 107506, 212818, 215012, 425636, 744863, 1489726, 2979452, 5214041, 10428082, 20856164]

約数ペア:

[(1, 20856164), (2, 10428082), (4, 5214041), (7, 2979452), (14, 1489726), (28, 744863), (49, 425636), (97, 215012), (98, 212818), (194, 107506), (196, 106409), (388, 53753), (679, 30716), (1097, 19012), (1358, 15358), (2194, 9506), (2716, 7679), (4388, 4753)]