21151823

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 27620352

約数和(自身を除く): 6468529

約数列:

[1, 7, 11, 53, 71, 73, 77, 371, 497, 511, 583, 781, 803, 3763, 3869, 4081, 5183, 5467, 5621, 26341, 27083, 36281, 41393, 42559, 57013, 274699, 289751, 297913, 399091, 1922893, 3021689, 21151823]

約数ペア:

[(1, 21151823), (7, 3021689), (11, 1922893), (53, 399091), (71, 297913), (73, 289751), (77, 274699), (371, 57013), (497, 42559), (511, 41393), (583, 36281), (781, 27083), (803, 26341), (3763, 5621), (3869, 5467), (4081, 5183)]