21355240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{28099}}^1$

素因数の和:28129

約数の個数: 32

約数和(自身を含む): 50580000

約数和(自身を除く): 29224760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 28099, 56198, 112396, 140495, 224792, 280990, 533881, 561980, 1067762, 1123960, 2135524, 2669405, 4271048, 5338810, 10677620, 21355240]

約数ペア:

[(1, 21355240), (2, 10677620), (4, 5338810), (5, 4271048), (8, 2669405), (10, 2135524), (19, 1123960), (20, 1067762), (38, 561980), (40, 533881), (76, 280990), (95, 224792), (152, 140495), (190, 112396), (380, 56198), (760, 28099)]