21992272

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{991}}^1$

素因数の和:1091

約数の個数: 40

約数和(自身を含む): 45512960

約数和(自身を除く): 23520688

約数列:

[1, 2, 4, 8, 16, 19, 38, 73, 76, 146, 152, 292, 304, 584, 991, 1168, 1387, 1982, 2774, 3964, 5548, 7928, 11096, 15856, 18829, 22192, 37658, 72343, 75316, 144686, 150632, 289372, 301264, 578744, 1157488, 1374517, 2749034, 5498068, 10996136, 21992272]

約数ペア:

[(1, 21992272), (2, 10996136), (4, 5498068), (8, 2749034), (16, 1374517), (19, 1157488), (38, 578744), (73, 301264), (76, 289372), (146, 150632), (152, 144686), (292, 75316), (304, 72343), (584, 37658), (991, 22192), (1168, 18829), (1387, 15856), (1982, 11096), (2774, 7928), (3964, 5548)]