261621789

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1237}}^1$

素因数の和:1310

約数の個数: 64

約数和(自身を含む): 449245440

約数和(自身を除く): 187623651

約数列:

[1, 3, 11, 13, 17, 29, 33, 39, 51, 87, 143, 187, 221, 319, 377, 429, 493, 561, 663, 957, 1131, 1237, 1479, 2431, 3711, 4147, 5423, 6409, 7293, 12441, 13607, 16081, 16269, 19227, 21029, 35873, 40821, 48243, 63087, 70499, 107619, 176891, 211497, 231319, 273377, 394603, 466349, 530673, 609841, 693957, 820131, 1183809, 1399047, 1829523, 3007147, 5129839, 6708251, 7927933, 9021441, 15389517, 20124753, 23783799, 87207263, 261621789]

約数ペア:

[(1, 261621789), (3, 87207263), (11, 23783799), (13, 20124753), (17, 15389517), (29, 9021441), (33, 7927933), (39, 6708251), (51, 5129839), (87, 3007147), (143, 1829523), (187, 1399047), (221, 1183809), (319, 820131), (377, 693957), (429, 609841), (493, 530673), (561, 466349), (663, 394603), (957, 273377), (1131, 231319), (1237, 211497), (1479, 176891), (2431, 107619), (3711, 70499), (4147, 63087), (5423, 48243), (6409, 40821), (7293, 35873), (12441, 21029), (13607, 19227), (16081, 16269)]