21213873

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{229}}^1$

素因数の和:358

約数の個数: 32

約数和(自身を含む): 32678400

約数和(自身を除く): 11464527

約数列:

[1, 3, 9, 27, 47, 73, 141, 219, 229, 423, 657, 687, 1269, 1971, 2061, 3431, 6183, 10293, 10763, 16717, 30879, 32289, 50151, 92637, 96867, 150453, 290601, 451359, 785699, 2357097, 7071291, 21213873]

約数ペア:

[(1, 21213873), (3, 7071291), (9, 2357097), (27, 785699), (47, 451359), (73, 290601), (141, 150453), (219, 96867), (229, 92637), (423, 50151), (657, 32289), (687, 30879), (1269, 16717), (1971, 10763), (2061, 10293), (3431, 6183)]