21088665

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 41109120

約数和(自身を除く): 20020455

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 47, 59, 65, 117, 141, 169, 177, 195, 235, 295, 423, 507, 531, 585, 611, 705, 767, 845, 885, 1521, 1833, 2115, 2301, 2535, 2655, 2773, 3055, 3835, 5499, 6903, 7605, 7943, 8319, 9165, 9971, 11505, 13865, 23829, 24957, 27495, 29913, 34515, 36049, 39715, 41595, 49855, 71487, 89739, 108147, 119145, 124785, 149565, 180245, 324441, 357435, 448695, 468637, 540735, 1405911, 1622205, 2343185, 4217733, 7029555, 21088665]

約数ペア:

[(1, 21088665), (3, 7029555), (5, 4217733), (9, 2343185), (13, 1622205), (15, 1405911), (39, 540735), (45, 468637), (47, 448695), (59, 357435), (65, 324441), (117, 180245), (141, 149565), (169, 124785), (177, 119145), (195, 108147), (235, 89739), (295, 71487), (423, 49855), (507, 41595), (531, 39715), (585, 36049), (611, 34515), (705, 29913), (767, 27495), (845, 24957), (885, 23829), (1521, 13865), (1833, 11505), (2115, 9971), (2301, 9165), (2535, 8319), (2655, 7943), (2773, 7605), (3055, 6903), (3835, 5499)]