20942970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{73}}^2\times {\mathrm{131}}^1$

素因数の和:287

約数の個数: 48

約数和(自身を含む): 51350112

約数和(自身を除く): 30407142

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 73, 131, 146, 219, 262, 365, 393, 438, 655, 730, 786, 1095, 1310, 1965, 2190, 3930, 5329, 9563, 10658, 15987, 19126, 26645, 28689, 31974, 47815, 53290, 57378, 79935, 95630, 143445, 159870, 286890, 698099, 1396198, 2094297, 3490495, 4188594, 6980990, 10471485, 20942970]

約数ペア:

[(1, 20942970), (2, 10471485), (3, 6980990), (5, 4188594), (6, 3490495), (10, 2094297), (15, 1396198), (30, 698099), (73, 286890), (131, 159870), (146, 143445), (219, 95630), (262, 79935), (365, 57378), (393, 53290), (438, 47815), (655, 31974), (730, 28689), (786, 26645), (1095, 19126), (1310, 15987), (1965, 10658), (2190, 9563), (3930, 5329)]