21661893

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 36908352

約数和(自身を除く): 15246459

約数列:

[1, 3, 9, 11, 17, 33, 51, 61, 99, 153, 183, 187, 211, 549, 561, 633, 671, 1037, 1683, 1899, 2013, 2321, 3111, 3587, 6039, 6963, 9333, 10761, 11407, 12871, 20889, 32283, 34221, 38613, 39457, 102663, 115839, 118371, 141581, 218807, 355113, 424743, 656421, 1274229, 1969263, 2406877, 7220631, 21661893]

約数ペア:

[(1, 21661893), (3, 7220631), (9, 2406877), (11, 1969263), (17, 1274229), (33, 656421), (51, 424743), (61, 355113), (99, 218807), (153, 141581), (183, 118371), (187, 115839), (211, 102663), (549, 39457), (561, 38613), (633, 34221), (671, 32283), (1037, 20889), (1683, 12871), (1899, 11407), (2013, 10761), (2321, 9333), (3111, 6963), (3587, 6039)]