20407569

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{181}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 34856640

約数和(自身を除く): 14449071

約数列:

[1, 3, 7, 13, 21, 39, 49, 59, 91, 147, 177, 181, 273, 413, 543, 637, 767, 1239, 1267, 1911, 2301, 2353, 2891, 3801, 5369, 7059, 8673, 8869, 10679, 16107, 16471, 26607, 32037, 37583, 49413, 74753, 112749, 115297, 138827, 224259, 345891, 416481, 523271, 971789, 1569813, 2915367, 6802523, 20407569]

約数ペア:

[(1, 20407569), (3, 6802523), (7, 2915367), (13, 1569813), (21, 971789), (39, 523271), (49, 416481), (59, 345891), (91, 224259), (147, 138827), (177, 115297), (181, 112749), (273, 74753), (413, 49413), (543, 37583), (637, 32037), (767, 26607), (1239, 16471), (1267, 16107), (1911, 10679), (2301, 8869), (2353, 8673), (2891, 7059), (3801, 5369)]