19916600

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^2\times {\mathrm{823}}^1$

素因数の和:861

約数の個数: 72

約数和(自身を含む): 50960280

約数和(自身を除く): 31043680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 121, 200, 220, 242, 275, 440, 484, 550, 605, 823, 968, 1100, 1210, 1646, 2200, 2420, 3025, 3292, 4115, 4840, 6050, 6584, 8230, 9053, 12100, 16460, 18106, 20575, 24200, 32920, 36212, 41150, 45265, 72424, 82300, 90530, 99583, 164600, 181060, 199166, 226325, 362120, 398332, 452650, 497915, 796664, 905300, 995830, 1810600, 1991660, 2489575, 3983320, 4979150, 9958300, 19916600]

約数ペア:

[(1, 19916600), (2, 9958300), (4, 4979150), (5, 3983320), (8, 2489575), (10, 1991660), (11, 1810600), (20, 995830), (22, 905300), (25, 796664), (40, 497915), (44, 452650), (50, 398332), (55, 362120), (88, 226325), (100, 199166), (110, 181060), (121, 164600), (200, 99583), (220, 90530), (242, 82300), (275, 72424), (440, 45265), (484, 41150), (550, 36212), (605, 32920), (823, 24200), (968, 20575), (1100, 18106), (1210, 16460), (1646, 12100), (2200, 9053), (2420, 8230), (3025, 6584), (3292, 6050), (4115, 4840)]