21497770

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{601}}^1$

素因数の和:695

約数の個数: 48

約数和(自身を含む): 45706248

約数和(自身を除く): 24208478

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 73, 98, 146, 245, 365, 490, 511, 601, 730, 1022, 1202, 2555, 3005, 3577, 4207, 5110, 6010, 7154, 8414, 17885, 21035, 29449, 35770, 42070, 43873, 58898, 87746, 147245, 219365, 294490, 307111, 438730, 614222, 1535555, 2149777, 3071110, 4299554, 10748885, 21497770]

約数ペア:

[(1, 21497770), (2, 10748885), (5, 4299554), (7, 3071110), (10, 2149777), (14, 1535555), (35, 614222), (49, 438730), (70, 307111), (73, 294490), (98, 219365), (146, 147245), (245, 87746), (365, 58898), (490, 43873), (511, 42070), (601, 35770), (730, 29449), (1022, 21035), (1202, 17885), (2555, 8414), (3005, 7154), (3577, 6010), (4207, 5110)]