21955840

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1009}}^1$

素因数の和:1047

約数の個数: 72

約数和(自身を含む): 55739880

約数和(自身を除く): 33784040

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 544, 640, 680, 1009, 1088, 1280, 1360, 2018, 2176, 2720, 4036, 4352, 5045, 5440, 8072, 10090, 10880, 16144, 17153, 20180, 21760, 32288, 34306, 40360, 64576, 68612, 80720, 85765, 129152, 137224, 161440, 171530, 258304, 274448, 322880, 343060, 548896, 645760, 686120, 1097792, 1291520, 1372240, 2195584, 2744480, 4391168, 5488960, 10977920, 21955840]

約数ペア:

[(1, 21955840), (2, 10977920), (4, 5488960), (5, 4391168), (8, 2744480), (10, 2195584), (16, 1372240), (17, 1291520), (20, 1097792), (32, 686120), (34, 645760), (40, 548896), (64, 343060), (68, 322880), (80, 274448), (85, 258304), (128, 171530), (136, 161440), (160, 137224), (170, 129152), (256, 85765), (272, 80720), (320, 68612), (340, 64576), (544, 40360), (640, 34306), (680, 32288), (1009, 21760), (1088, 20180), (1280, 17153), (1360, 16144), (2018, 10880), (2176, 10090), (2720, 8072), (4036, 5440), (4352, 5045)]