20921264

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{14369}}^1$

素因数の和:14397

約数の個数: 40

約数和(自身を含む): 49892640

約数和(自身を除く): 28971376

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1456, 14369, 28738, 57476, 100583, 114952, 186797, 201166, 229904, 373594, 402332, 747188, 804664, 1307579, 1494376, 1609328, 2615158, 2988752, 5230316, 10460632, 20921264]

約数ペア:

[(1, 20921264), (2, 10460632), (4, 5230316), (7, 2988752), (8, 2615158), (13, 1609328), (14, 1494376), (16, 1307579), (26, 804664), (28, 747188), (52, 402332), (56, 373594), (91, 229904), (104, 201166), (112, 186797), (182, 114952), (208, 100583), (364, 57476), (728, 28738), (1456, 14369)]