20819920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{401}}^1$

素因数の和:484

約数の個数: 80

約数和(自身を含む): 53835840

約数和(自身を除く): 33015920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 59, 80, 88, 110, 118, 176, 220, 236, 295, 401, 440, 472, 590, 649, 802, 880, 944, 1180, 1298, 1604, 2005, 2360, 2596, 3208, 3245, 4010, 4411, 4720, 5192, 6416, 6490, 8020, 8822, 10384, 12980, 16040, 17644, 22055, 23659, 25960, 32080, 35288, 44110, 47318, 51920, 70576, 88220, 94636, 118295, 176440, 189272, 236590, 260249, 352880, 378544, 473180, 520498, 946360, 1040996, 1301245, 1892720, 2081992, 2602490, 4163984, 5204980, 10409960, 20819920]

約数ペア:

[(1, 20819920), (2, 10409960), (4, 5204980), (5, 4163984), (8, 2602490), (10, 2081992), (11, 1892720), (16, 1301245), (20, 1040996), (22, 946360), (40, 520498), (44, 473180), (55, 378544), (59, 352880), (80, 260249), (88, 236590), (110, 189272), (118, 176440), (176, 118295), (220, 94636), (236, 88220), (295, 70576), (401, 51920), (440, 47318), (472, 44110), (590, 35288), (649, 32080), (802, 25960), (880, 23659), (944, 22055), (1180, 17644), (1298, 16040), (1604, 12980), (2005, 10384), (2360, 8822), (2596, 8020), (3208, 6490), (3245, 6416), (4010, 5192), (4411, 4720)]