21530985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{53}}^2\times {\mathrm{73}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 40677504

約数和(自身を除く): 19146519

約数列:

[1, 3, 5, 7, 15, 21, 35, 53, 73, 105, 159, 219, 265, 365, 371, 511, 795, 1095, 1113, 1533, 1855, 2555, 2809, 3869, 5565, 7665, 8427, 11607, 14045, 19345, 19663, 27083, 42135, 58035, 58989, 81249, 98315, 135415, 205057, 294945, 406245, 615171, 1025285, 1435399, 3075855, 4306197, 7176995, 21530985]

約数ペア:

[(1, 21530985), (3, 7176995), (5, 4306197), (7, 3075855), (15, 1435399), (21, 1025285), (35, 615171), (53, 406245), (73, 294945), (105, 205057), (159, 135415), (219, 98315), (265, 81249), (365, 58989), (371, 58035), (511, 42135), (795, 27083), (1095, 19663), (1113, 19345), (1533, 14045), (1855, 11607), (2555, 8427), (2809, 7665), (3869, 5565)]