21656880

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4297}}^1$

素因数の和:4323

約数の個数: 120

約数和(自身を含む): 83140512

約数和(自身を除く): 61483632

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4297, 5040, 8594, 12891, 17188, 21485, 25782, 30079, 34376, 38673, 42970, 51564, 60158, 64455, 68752, 77346, 85940, 90237, 103128, 120316, 128910, 150395, 154692, 171880, 180474, 193365, 206256, 240632, 257820, 270711, 300790, 309384, 343760, 360948, 386730, 451185, 481264, 515640, 541422, 601580, 618768, 721896, 773460, 902370, 1031280, 1082844, 1203160, 1353555, 1443792, 1546920, 1804740, 2165688, 2406320, 2707110, 3093840, 3609480, 4331376, 5414220, 7218960, 10828440, 21656880]

約数ペア:

[(1, 21656880), (2, 10828440), (3, 7218960), (4, 5414220), (5, 4331376), (6, 3609480), (7, 3093840), (8, 2707110), (9, 2406320), (10, 2165688), (12, 1804740), (14, 1546920), (15, 1443792), (16, 1353555), (18, 1203160), (20, 1082844), (21, 1031280), (24, 902370), (28, 773460), (30, 721896), (35, 618768), (36, 601580), (40, 541422), (42, 515640), (45, 481264), (48, 451185), (56, 386730), (60, 360948), (63, 343760), (70, 309384), (72, 300790), (80, 270711), (84, 257820), (90, 240632), (105, 206256), (112, 193365), (120, 180474), (126, 171880), (140, 154692), (144, 150395), (168, 128910), (180, 120316), (210, 103128), (240, 90237), (252, 85940), (280, 77346), (315, 68752), (336, 64455), (360, 60158), (420, 51564), (504, 42970), (560, 38673), (630, 34376), (720, 30079), (840, 25782), (1008, 21485), (1260, 17188), (1680, 12891), (2520, 8594), (4297, 5040)]