21064120

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{977}}^1$

素因数の和:1013

約数の個数: 96

約数和(自身を含む): 60205680

約数和(自身を除く): 39141560

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 98, 110, 140, 154, 196, 220, 245, 280, 308, 385, 392, 440, 490, 539, 616, 770, 977, 980, 1078, 1540, 1954, 1960, 2156, 2695, 3080, 3908, 4312, 4885, 5390, 6839, 7816, 9770, 10747, 10780, 13678, 19540, 21494, 21560, 27356, 34195, 39080, 42988, 47873, 53735, 54712, 68390, 75229, 85976, 95746, 107470, 136780, 150458, 191492, 214940, 239365, 273560, 300916, 376145, 382984, 429880, 478730, 526603, 601832, 752290, 957460, 1053206, 1504580, 1914920, 2106412, 2633015, 3009160, 4212824, 5266030, 10532060, 21064120]

約数ペア:

[(1, 21064120), (2, 10532060), (4, 5266030), (5, 4212824), (7, 3009160), (8, 2633015), (10, 2106412), (11, 1914920), (14, 1504580), (20, 1053206), (22, 957460), (28, 752290), (35, 601832), (40, 526603), (44, 478730), (49, 429880), (55, 382984), (56, 376145), (70, 300916), (77, 273560), (88, 239365), (98, 214940), (110, 191492), (140, 150458), (154, 136780), (196, 107470), (220, 95746), (245, 85976), (280, 75229), (308, 68390), (385, 54712), (392, 53735), (440, 47873), (490, 42988), (539, 39080), (616, 34195), (770, 27356), (977, 21560), (980, 21494), (1078, 19540), (1540, 13678), (1954, 10780), (1960, 10747), (2156, 9770), (2695, 7816), (3080, 6839), (3908, 5390), (4312, 4885)]