21563145

素因数分解:

$3^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{757}}^1$

素因数の和:982

約数の個数: 32

約数和(自身を含む): 38567040

約数和(自身を除く): 17003895

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 211, 633, 757, 1055, 1899, 2271, 3165, 3785, 5697, 6813, 9495, 11355, 20439, 28485, 34065, 102195, 159727, 479181, 798635, 1437543, 2395905, 4312629, 7187715, 21563145]

約数ペア:

[(1, 21563145), (3, 7187715), (5, 4312629), (9, 2395905), (15, 1437543), (27, 798635), (45, 479181), (135, 159727), (211, 102195), (633, 34065), (757, 28485), (1055, 20439), (1899, 11355), (2271, 9495), (3165, 6813), (3785, 5697)]