21505074920

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{271}}^1\times {\mathrm{40487}}^1$

素因数の和:40783

約数の個数: 96

約数和(自身を含む): 56495335680

約数和(自身を除く): 34990260760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 271, 280, 392, 490, 542, 980, 1084, 1355, 1897, 1960, 2168, 2710, 3794, 5420, 7588, 9485, 10840, 13279, 15176, 18970, 26558, 37940, 40487, 53116, 66395, 75880, 80974, 106232, 132790, 161948, 202435, 265580, 283409, 323896, 404870, 531160, 566818, 809740, 1133636, 1417045, 1619480, 1983863, 2267272, 2834090, 3967726, 5668180, 7935452, 9919315, 10971977, 11336360, 15870904, 19838630, 21943954, 39677260, 43887908, 54859885, 76803839, 79354520, 87775816, 109719770, 153607678, 219439540, 307215356, 384019195, 438879080, 537626873, 614430712, 768038390, 1075253746, 1536076780, 2150507492, 2688134365, 3072153560, 4301014984, 5376268730, 10752537460, 21505074920]

約数ペア:

[(1, 21505074920), (2, 10752537460), (4, 5376268730), (5, 4301014984), (7, 3072153560), (8, 2688134365), (10, 2150507492), (14, 1536076780), (20, 1075253746), (28, 768038390), (35, 614430712), (40, 537626873), (49, 438879080), (56, 384019195), (70, 307215356), (98, 219439540), (140, 153607678), (196, 109719770), (245, 87775816), (271, 79354520), (280, 76803839), (392, 54859885), (490, 43887908), (542, 39677260), (980, 21943954), (1084, 19838630), (1355, 15870904), (1897, 11336360), (1960, 10971977), (2168, 9919315), (2710, 7935452), (3794, 5668180), (5420, 3967726), (7588, 2834090), (9485, 2267272), (10840, 1983863), (13279, 1619480), (15176, 1417045), (18970, 1133636), (26558, 809740), (37940, 566818), (40487, 531160), (53116, 404870), (66395, 323896), (75880, 283409), (80974, 265580), (106232, 202435), (132790, 161948)]