21078960

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12547}}^1$

素因数の和:12570

約数の個数: 80

約数和(自身を含む): 74685696

約数和(自身を除く): 53606736

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12547, 25094, 37641, 50188, 62735, 75282, 87829, 100376, 125470, 150564, 175658, 188205, 200752, 250940, 263487, 301128, 351316, 376410, 439145, 501880, 526974, 602256, 702632, 752820, 878290, 1003760, 1053948, 1317435, 1405264, 1505640, 1756580, 2107896, 2634870, 3011280, 3513160, 4215792, 5269740, 7026320, 10539480, 21078960]

約数ペア:

[(1, 21078960), (2, 10539480), (3, 7026320), (4, 5269740), (5, 4215792), (6, 3513160), (7, 3011280), (8, 2634870), (10, 2107896), (12, 1756580), (14, 1505640), (15, 1405264), (16, 1317435), (20, 1053948), (21, 1003760), (24, 878290), (28, 752820), (30, 702632), (35, 602256), (40, 526974), (42, 501880), (48, 439145), (56, 376410), (60, 351316), (70, 301128), (80, 263487), (84, 250940), (105, 200752), (112, 188205), (120, 175658), (140, 150564), (168, 125470), (210, 100376), (240, 87829), (280, 75282), (336, 62735), (420, 50188), (560, 37641), (840, 25094), (1680, 12547)]