21254240

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2711}}^1$

素因数の和:2740

約数の個数: 72

約数和(自身を含む): 58432752

約数和(自身を除く): 37178512

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2711, 3920, 5422, 7840, 10844, 13555, 18977, 21688, 27110, 37954, 43376, 54220, 75908, 86752, 94885, 108440, 132839, 151816, 189770, 216880, 265678, 303632, 379540, 433760, 531356, 607264, 664195, 759080, 1062712, 1328390, 1518160, 2125424, 2656780, 3036320, 4250848, 5313560, 10627120, 21254240]

約数ペア:

[(1, 21254240), (2, 10627120), (4, 5313560), (5, 4250848), (7, 3036320), (8, 2656780), (10, 2125424), (14, 1518160), (16, 1328390), (20, 1062712), (28, 759080), (32, 664195), (35, 607264), (40, 531356), (49, 433760), (56, 379540), (70, 303632), (80, 265678), (98, 216880), (112, 189770), (140, 151816), (160, 132839), (196, 108440), (224, 94885), (245, 86752), (280, 75908), (392, 54220), (490, 43376), (560, 37954), (784, 27110), (980, 21688), (1120, 18977), (1568, 13555), (1960, 10844), (2711, 7840), (3920, 5422)]