21439197

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 36062208

約数和(自身を除く): 14623011

約数列:

[1, 3, 9, 13, 23, 31, 39, 69, 93, 117, 207, 257, 279, 299, 403, 713, 771, 897, 1209, 2139, 2313, 2691, 3341, 3627, 5911, 6417, 7967, 9269, 10023, 17733, 23901, 27807, 30069, 53199, 71703, 76843, 83421, 103571, 183241, 230529, 310713, 549723, 691587, 932139, 1649169, 2382133, 7146399, 21439197]

約数ペア:

[(1, 21439197), (3, 7146399), (9, 2382133), (13, 1649169), (23, 932139), (31, 691587), (39, 549723), (69, 310713), (93, 230529), (117, 183241), (207, 103571), (257, 83421), (279, 76843), (299, 71703), (403, 53199), (713, 30069), (771, 27807), (897, 23901), (1209, 17733), (2139, 10023), (2313, 9269), (2691, 7967), (3341, 6417), (3627, 5911)]