21560280

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25667}}^1$

素因数の和:25688

約数の個数: 64

約数和(自身を含む): 73923840

約数和(自身を除く): 52363560

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25667, 51334, 77001, 102668, 128335, 154002, 179669, 205336, 256670, 308004, 359338, 385005, 513340, 539007, 616008, 718676, 770010, 898345, 1026680, 1078014, 1437352, 1540020, 1796690, 2156028, 2695035, 3080040, 3593380, 4312056, 5390070, 7186760, 10780140, 21560280]

約数ペア:

[(1, 21560280), (2, 10780140), (3, 7186760), (4, 5390070), (5, 4312056), (6, 3593380), (7, 3080040), (8, 2695035), (10, 2156028), (12, 1796690), (14, 1540020), (15, 1437352), (20, 1078014), (21, 1026680), (24, 898345), (28, 770010), (30, 718676), (35, 616008), (40, 539007), (42, 513340), (56, 385005), (60, 359338), (70, 308004), (84, 256670), (105, 205336), (120, 179669), (140, 154002), (168, 128335), (210, 102668), (280, 77001), (420, 51334), (840, 25667)]