21981813

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:745

約数の個数: 32

約数和(自身を含む): 35500032

約数和(自身を除く): 13518219

約数列:

[1, 3, 7, 21, 23, 69, 71, 161, 213, 483, 497, 641, 1491, 1633, 1923, 4487, 4899, 11431, 13461, 14743, 34293, 44229, 45511, 103201, 136533, 309603, 318577, 955731, 1046753, 3140259, 7327271, 21981813]

約数ペア:

[(1, 21981813), (3, 7327271), (7, 3140259), (21, 1046753), (23, 955731), (69, 318577), (71, 309603), (161, 136533), (213, 103201), (483, 45511), (497, 44229), (641, 34293), (1491, 14743), (1633, 13461), (1923, 11431), (4487, 4899)]