21009440

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6911}}^1$

素因数の和:6945

約数の個数: 48

約数和(自身を含む): 52254720

約数和(自身を除く): 31245280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6911, 13822, 27644, 34555, 55288, 69110, 110576, 131309, 138220, 221152, 262618, 276440, 525236, 552880, 656545, 1050472, 1105760, 1313090, 2100944, 2626180, 4201888, 5252360, 10504720, 21009440]

約数ペア:

[(1, 21009440), (2, 10504720), (4, 5252360), (5, 4201888), (8, 2626180), (10, 2100944), (16, 1313090), (19, 1105760), (20, 1050472), (32, 656545), (38, 552880), (40, 525236), (76, 276440), (80, 262618), (95, 221152), (152, 138220), (160, 131309), (190, 110576), (304, 69110), (380, 55288), (608, 34555), (760, 27644), (1520, 13822), (3040, 6911)]