21781788

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{743}}^1$

素因数の和:1106

約数の個数: 48

約数和(自身を含む): 58329600

約数和(自身を除く): 36547812

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 349, 698, 743, 1047, 1396, 1486, 2094, 2229, 2443, 2972, 4188, 4458, 4886, 5201, 7329, 8916, 9772, 10402, 14658, 15603, 20804, 29316, 31206, 62412, 259307, 518614, 777921, 1037228, 1555842, 1815149, 3111684, 3630298, 5445447, 7260596, 10890894, 21781788]

約数ペア:

[(1, 21781788), (2, 10890894), (3, 7260596), (4, 5445447), (6, 3630298), (7, 3111684), (12, 1815149), (14, 1555842), (21, 1037228), (28, 777921), (42, 518614), (84, 259307), (349, 62412), (698, 31206), (743, 29316), (1047, 20804), (1396, 15603), (1486, 14658), (2094, 10402), (2229, 9772), (2443, 8916), (2972, 7329), (4188, 5201), (4458, 4886)]