21888387

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{379}}^1$

素因数の和:445

約数の個数: 40

約数和(自身を含む): 35312640

約数和(自身を除く): 13424253

約数列:

[1, 3, 9, 23, 27, 31, 69, 81, 93, 207, 279, 379, 621, 713, 837, 1137, 1863, 2139, 2511, 3411, 6417, 8717, 10233, 11749, 19251, 26151, 30699, 35247, 57753, 78453, 105741, 235359, 270227, 317223, 706077, 810681, 951669, 2432043, 7296129, 21888387]

約数ペア:

[(1, 21888387), (3, 7296129), (9, 2432043), (23, 951669), (27, 810681), (31, 706077), (69, 317223), (81, 270227), (93, 235359), (207, 105741), (279, 78453), (379, 57753), (621, 35247), (713, 30699), (837, 26151), (1137, 19251), (1863, 11749), (2139, 10233), (2511, 8717), (3411, 6417)]