21318219

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 35206080

約数和(自身を除く): 13887861

約数列:

[1, 3, 9, 13, 29, 39, 61, 87, 103, 117, 183, 261, 309, 377, 549, 793, 927, 1131, 1339, 1769, 2379, 2987, 3393, 4017, 5307, 6283, 7137, 8961, 12051, 15921, 18849, 22997, 26883, 38831, 56547, 68991, 81679, 116493, 182207, 206973, 245037, 349479, 546621, 735111, 1639863, 2368691, 7106073, 21318219]

約数ペア:

[(1, 21318219), (3, 7106073), (9, 2368691), (13, 1639863), (29, 735111), (39, 546621), (61, 349479), (87, 245037), (103, 206973), (117, 182207), (183, 116493), (261, 81679), (309, 68991), (377, 56547), (549, 38831), (793, 26883), (927, 22997), (1131, 18849), (1339, 15921), (1769, 12051), (2379, 8961), (2987, 7137), (3393, 6283), (4017, 5307)]